Mercedes-Benz OBD2 Codes: A Comprehensive Guide to Diagnosis and Troubleshooting

For Mercedes-Benz owners and automotive technicians alike, understanding OBD2 codes is crucial for maintaining vehicle health and performance. The On-Board Diagnostic System, specifically OBD2, acts as the car’s internal health monitor. When your Mercedes-Benz detects an issue, it communicates through these standardized codes, signaling that something needs attention. This guide, tailored for the English-speaking market and optimized for “Obd2 Codes Mercedes Benz,” dives deep into the world of Mercedes-Benz specific OBD2 codes, providing you with the knowledge to understand, troubleshoot, and address these diagnostic signals effectively.

Whether you are a seasoned mechanic or a Mercedes-Benz owner keen on understanding your vehicle better, this comprehensive resource will enhance your ability to diagnose problems, ensure your Mercedes-Benz runs smoothly, and prolong its life.

To easily navigate through this extensive guide, use the following section links to jump directly to your area of interest:

For quick access to a specific code, use the “Find” function in your browser (Ctrl+F or Command+F) and type in the code you are looking for. This is especially useful if you already know the exact code you need to investigate.

Understanding OBD-II Codes

The Foundation of Automotive Diagnostics

OBD-II codes are the standardized language of modern vehicle diagnostics. Since their introduction in the mid-1990s, OBD-II systems have become mandatory in most vehicles, including all Mercedes-Benz models. These systems are designed to monitor the performance of the engine, transmission, emission controls, and other major components. When the system detects a problem that could affect emissions or vehicle operation, it generates a Diagnostic Trouble Code (DTC), also known as an OBD-II code or fault code.

The most common indicator of an OBD-II code is the illumination of the “Check Engine Light” (CEL), also sometimes referred to as the “Malfunction Indicator Lamp” (MIL), on your dashboard. This light signals that the vehicle’s computer has stored one or more trouble codes. These codes provide valuable information about the nature and location of the problem.

The OBD-II Port: Your Diagnostic Gateway

Every Mercedes-Benz is equipped with an OBD-II port, typically located beneath the dashboard on the driver’s side. This port is the interface point for diagnostic scanners. By connecting an OBD-II scanner to this port, you or a technician can retrieve the stored trouble codes and access real-time vehicle data.

OBD-II scanners range from basic handheld devices that only read codes to advanced professional-grade tools that can perform in-depth diagnostics, system tests, and even programming functions. For Mercedes-Benz vehicles, it’s often beneficial to use scanners that are specifically designed or enhanced for Mercedes-Benz systems to ensure comprehensive and accurate readings.

Deciphering the Code Structure

OBD-II codes are alphanumeric, typically consisting of five characters. Understanding the structure of these codes can provide initial insights into the problem area:

First Character (Letter): Indicates the system affected:
- P (Powertrain): Engine, transmission, and related systems.
- C (Chassis): Braking system, steering, suspension.
- B (Body): Interior components, airbags, climate control, etc.
- U (Network/Communication): Communication networks within the vehicle, like CAN bus.
Second Character (Digit): Specifies whether the code is generic or manufacturer-specific:
- 0: Generic OBD-II code (standard across all manufacturers).
- 1: Manufacturer-specific code (unique to Mercedes-Benz).
Third Character (Digit): Indicates the subsystem affected:
- 0: Fuel and air metering and auxiliary emission controls.
- 1: Fuel and air metering.
- 2: Fuel and air metering (injector circuit).
- 3: Ignition system or misfires.
- 4: Auxiliary emission controls.
- 5: Vehicle speed controls and idle control system.
- 6: Computer output circuit.
- 7: Transmission.
- 8: Transmission.
- 9: Transmission.
Fourth and Fifth Characters (Digits): These two digits are specific and indicate the exact fault within the identified system and subsystem. For example, P0300 indicates a “Random/Multiple Cylinder Misfire Detected,” while P0301 specifies a “Cylinder 1 Misfire Detected.”

Generic vs. Manufacturer-Specific Codes in Mercedes-Benz

While OBD-II standards mandate generic codes for emission-related issues across all vehicles, manufacturers like Mercedes-Benz also utilize manufacturer-specific codes to provide more detailed diagnostics beyond the basic requirements.

Generic Codes: These codes, often starting with P0, are standardized by the Society of Automotive Engineers (SAE). They offer a general indication of the problem and are common to all OBD-II compliant vehicles.
Manufacturer-Specific Codes: Mercedes-Benz uses codes that typically start with P1, B, C, or U followed by four digits. These codes provide more precise information related to Mercedes-Benz’s unique systems and components. They often cover issues not addressed by generic codes, allowing for more accurate diagnosis and repair.

Understanding whether a code is generic or manufacturer-specific is important for accurate troubleshooting, especially when dealing with advanced systems in a Mercedes-Benz. Manufacturer-specific codes often require Mercedes-Benz specific diagnostic tools for proper interpretation.

Alt text: Location of the OBD-II port in a typical car, similar to Mercedes-Benz models, usually found under the dashboard on the driver’s side.

Common Mercedes-Benz OBD-II Codes and Their Meanings

This section outlines some of the most frequently encountered OBD-II codes in Mercedes-Benz vehicles. For each code, we provide a description, possible causes, and potential solutions. Note that “Adsitco Products” are mentioned to indicate the types of parts that Adsitco, as a parts supplier, might offer for these issues.

P0100 – Mass Air Flow (MAF) Circuit Malfunction

Description: This code indicates that the engine control unit (ECU) has detected a problem with the Mass Air Flow (MAF) sensor or its circuit. The MAF sensor measures the amount of air entering the engine, which is crucial for calculating the correct fuel mixture.
Possible Causes:
- Dirty or contaminated MAF sensor.
- Faulty or failing MAF sensor.
- Air leaks between the MAF sensor and the throttle body.
- Damaged wiring or connectors in the MAF sensor circuit.
- Vacuum leaks in the intake system.
Solutions:
- Clean the MAF sensor using a specialized MAF sensor cleaner.
- Inspect and replace the air filter if it is dirty or clogged.
- Check for air leaks in the intake system and repair them.
- Inspect the wiring and connectors of the MAF sensor for damage or corrosion; repair or replace as necessary.
- If cleaning and wiring checks do not resolve the issue, replace the MAF sensor.
Adsitco Products: Mass Air Flow (MAF) sensors, air filters, intake system components, wiring connectors.

P0130 – O2 Sensor Circuit Malfunction (Bank 1, Sensor 1)

Description: This code signifies a malfunction in the oxygen sensor circuit for Bank 1, Sensor 1. Oxygen sensors monitor the oxygen content in the exhaust gas to help the ECU adjust the air-fuel mixture for optimal combustion and emission control. Bank 1, Sensor 1 is typically located before the catalytic converter.
Possible Causes:
- Faulty oxygen sensor (Bank 1, Sensor 1).
- Wiring issues to the oxygen sensor (open, short, corrosion).
- Exhaust leaks near the sensor.
- Contaminated or aged oxygen sensor.
- ECU malfunction (less likely).
Solutions:
- Inspect the oxygen sensor wiring and connectors for damage or corrosion; repair if needed.
- Check for exhaust leaks near the sensor and repair any leaks.
- Test the oxygen sensor using a multimeter or scanner to check its response and heater circuit.
- Replace the oxygen sensor (Bank 1, Sensor 1).
- In rare cases, ECU issues might need investigation.
Adsitco Products: Oxygen sensors, exhaust system components, wiring harnesses, diagnostic tools.

P0171 – System Too Lean (Bank 1)

Description: This code indicates that the engine management system has detected a lean condition in Bank 1, meaning there is too much air and not enough fuel in the air-fuel mixture. Bank 1 refers to the side of the engine where cylinder #1 is located.
Possible Causes:
- Vacuum leaks in the intake manifold or vacuum lines.
- Faulty or dirty fuel injectors.
- Low fuel pressure (faulty fuel pump, clogged fuel filter).
- MAF sensor malfunction (underreporting airflow).
- Air intake leaks after the MAF sensor.
- Exhaust leaks before the oxygen sensor.
Solutions:
- Check for vacuum leaks by visually inspecting hoses and using a vacuum gauge or smoke test. Repair any leaks found.
- Inspect and clean or replace fuel injectors.
- Test fuel pressure and fuel pump performance; replace fuel filter and/or fuel pump if necessary.
- Check MAF sensor readings and consider cleaning or replacing it.
- Inspect the air intake system for leaks after the MAF sensor.
- Check for exhaust leaks before the oxygen sensor and repair them.
Adsitco Products: Vacuum hoses, fuel injectors, fuel pumps, fuel filters, MAF sensors, air intake components, exhaust system parts.

P0300 – Random/Multiple Cylinder Misfire Detected

Description: This code indicates that the ECU has detected random or multiple misfires across different cylinders. A misfire occurs when there is incomplete combustion in one or more cylinders, leading to reduced engine performance, increased emissions, and potential engine damage.
Possible Causes:
- Faulty spark plugs (worn, fouled, or incorrect type).
- Faulty ignition coils.
- Distributor cap and rotor issues (in older models).
- Vacuum leaks.
- Low fuel pressure or faulty fuel injectors.
- Engine mechanical problems (low compression, valve issues).
- EGR valve issues.
- Crankshaft or camshaft position sensor issues.
Solutions:
- Inspect and replace spark plugs.
- Test ignition coils and replace faulty ones.
- Check distributor components (cap, rotor, wires) if applicable.
- Check for vacuum leaks and repair.
- Test fuel pressure and injector performance.
- Perform engine compression test and leak-down test to check for mechanical issues.
- Inspect EGR valve for proper operation.
- Check crankshaft and camshaft position sensors.
Adsitco Products: Spark plugs, ignition coils, distributor caps, rotors, ignition wires, vacuum hoses, fuel injectors, fuel pumps, engine components, EGR valves, crankshaft and camshaft sensors.

P0410 – Secondary Air Injection System Malfunction

Description: This code indicates a problem with the Secondary Air Injection (SAI) system. The SAI system helps reduce emissions during cold starts by pumping fresh air into the exhaust system to help burn off excess hydrocarbons.
Possible Causes:
- Faulty secondary air injection pump.
- Blocked or leaking air injection hoses.
- Faulty check valve(s).
- Faulty air switching valve or solenoid.
- Relay or fuse problems in the SAI system circuit.
- Carbon buildup in the air injection passages.
Solutions:
- Test the secondary air injection pump for proper operation; replace if faulty.
- Inspect air injection hoses for blockages or leaks; clear blockages or replace hoses.
- Check the check valve(s) to ensure they are functioning correctly (allowing air flow in only one direction); replace if faulty.
- Test the air switching valve and solenoid; replace if faulty.
- Check the relay and fuse for the SAI system; replace if blown or faulty.
- In some cases, carbon buildup in the air injection passages may require professional cleaning.
Adsitco Products: Secondary air injection pumps, air injection hoses, check valves, air switching valves, solenoids, relays, fuses, emission control components.

P0500 – Vehicle Speed Sensor Malfunction

Description: This code indicates a malfunction in the Vehicle Speed Sensor (VSS) circuit. The VSS is used by the ECU, ABS, and transmission control module to measure vehicle speed for various functions like speedometer operation, transmission shifting, and stability control.
Possible Causes:
- Faulty vehicle speed sensor.
- Damaged wiring or connectors to the VSS.
- Malfunctioning instrument cluster or speedometer.
- Issues with the ECU or ABS control module.
Solutions:
- Test the vehicle speed sensor; replace if faulty.
- Inspect the wiring and connectors to the VSS for damage or corrosion; repair or replace as necessary.
- Check the speedometer and instrument cluster functionality.
- In some cases, ECU or ABS module issues may need to be investigated.
Adsitco Products: Vehicle speed sensors, wiring harnesses, instrument cluster components, ECU and ABS modules.

P0560 – System Voltage Malfunction

Description: This code indicates a problem with the vehicle’s system voltage. It means the voltage is either too high or too low, which can affect the operation of various electrical and electronic systems in the car.
Possible Causes:
- Weak or failing battery.
- Faulty alternator (not charging properly or overcharging).
- Loose or corroded battery terminals.
- Bad ground connections.
- Voltage regulator malfunction.
- Parasitic drain on the battery.
Solutions:
- Test the battery’s voltage and charging capacity; replace the battery if weak or failing.
- Test the alternator’s output voltage and charging current; repair or replace the alternator if faulty.
- Clean and tighten battery terminals and check battery cables for corrosion or damage.
- Check and clean ground connections.
- Test the voltage regulator (often integrated with the alternator); replace if faulty.
- Check for parasitic drain by performing a parasitic draw test; identify and eliminate the source of the drain.
Adsitco Products: Batteries, alternators, voltage regulators, battery terminals, battery cables, electrical connectors, wiring components.

P0700 – Transmission Control System Malfunction

Description: This is a generic transmission fault code indicating a malfunction within the Transmission Control System (TCS). It’s often a precursor code, suggesting that there are additional transmission-related codes stored in the Transmission Control Module (TCM).
Possible Causes:
- Various transmission sensor failures (speed sensors, temperature sensor, etc.).
- Transmission fluid level or condition issues.
- Solenoid malfunctions within the transmission.
- Internal mechanical problems in the transmission.
- Wiring or connector issues in the transmission control system.
- ECM/PCM issues affecting transmission control (less common).
Solutions:
- Use a diagnostic scanner capable of reading transmission codes to retrieve more specific TCM codes.
- Check transmission fluid level and condition; perform a fluid change if necessary.
- Based on specific TCM codes, diagnose and replace faulty sensors or solenoids.
- For internal mechanical issues, transmission rebuild or replacement may be necessary.
- Inspect wiring and connectors for damage or corrosion; repair or replace as needed.
- In rare cases, ECM/PCM issues may require investigation.
Adsitco Products: Transmission sensors, transmission solenoids, transmission fluid, transmission filters, transmission rebuild kits, wiring harnesses, ECM/PCM components.

P0720 – Output Speed Sensor Circuit Malfunction

Description: This code indicates a malfunction in the Output Speed Sensor (OSS) circuit. The OSS measures the output shaft speed of the transmission, which is important for transmission control, speedometer function, and sometimes ABS/stability control systems.
Possible Causes:
- Faulty output speed sensor.
- Wiring or connector issues to the OSS.
- Mechanical damage to the sensor or reluctor ring.
- Transmission control module (TCM) issues.
Solutions:
- Test the output speed sensor; replace if faulty.
- Inspect wiring and connectors for damage or corrosion; repair or replace as needed.
- Check for mechanical damage to the sensor or reluctor ring (tone wheel).
- In some cases, TCM issues may require investigation.
Adsitco Products: Output speed sensors, transmission parts, wiring harnesses, TCM components.

P0730 – Incorrect Gear Ratio

Description: This code indicates that the transmission control module (TCM) has detected an incorrect gear ratio in the transmission. This means that the input speed and output speed of the transmission are not correlating correctly for the commanded gear.
Possible Causes:
- Transmission slipping due to worn clutches or bands.
- Low transmission fluid level or pressure.
- Faulty shift solenoids.
- Valve body issues in the transmission.
- Input or output speed sensor malfunctions.
- Mechanical damage within the transmission.
- TCM malfunction (less likely).
Solutions:
- Check transmission fluid level and condition; replenish or change fluid as needed.
- Inspect for transmission slippage; a transmission service or rebuild may be required if slippage is significant.
- Test shift solenoids for proper function; replace faulty solenoids.
- Valve body issues may require valve body repair or replacement.
- Check input and output speed sensors for proper readings; replace faulty sensors.
- For internal mechanical damage, transmission overhaul or replacement may be necessary.
- In rare cases, TCM issues may require investigation.
Adsitco Products: Transmission fluid, transmission filters, shift solenoids, valve bodies, input and output speed sensors, transmission rebuild kits, transmission components, TCM components.

P2006 – Intake Manifold Runner Control Stuck Closed Bank 1

Description: This code indicates that the Intake Manifold Runner Control (IMRC) valve for Bank 1 is stuck closed. The IMRC system uses flaps in the intake manifold to optimize air flow at different engine speeds for better performance and fuel efficiency. When stuck closed, it can restrict air flow, especially at higher RPMs.
Possible Causes:
- Faulty IMRC valve or actuator.
- Vacuum leak in the IMRC system.
- Mechanical binding or blockage in the IMRC runner flaps.
- Wiring or connector issues to the IMRC actuator.
- Carbon buildup around the IMRC flaps.
Solutions:
- Inspect the IMRC valve and actuator for proper operation; replace if faulty.
- Check for vacuum leaks in the IMRC system; repair any leaks.
- Manually check the IMRC runner flaps for free movement and remove any obstructions or carbon buildup.
- Inspect wiring and connectors to the IMRC actuator; repair or replace as needed.
- In some cases, the intake manifold itself may need to be removed and cleaned.
Adsitco Products: Intake manifold components, IMRC valves, actuators, vacuum lines, intake manifold gaskets, wiring connectors.

P2187 – System Too Lean at Idle (Bank 1)

Description: This code is similar to P0171 but specifically indicates a “System Too Lean” condition in Bank 1 that is occurring at idle. It means the air-fuel mixture is too lean (too much air, not enough fuel) specifically when the engine is idling.
Possible Causes:
- Vacuum leaks, particularly those affecting idle conditions.
- Faulty or dirty fuel injectors (especially if they are not delivering enough fuel at low flow rates).
- MAF sensor underreporting airflow.
- PCV (Positive Crankcase Ventilation) system leaks.
- Air metering issues at idle.
Solutions:
- Thoroughly check for vacuum leaks, paying special attention to areas that might affect idle vacuum.
- Inspect and test fuel injectors, especially their performance at low flow rates; clean or replace if necessary.
- Check MAF sensor readings at idle; consider cleaning or replacing.
- Inspect the PCV system for leaks or malfunctions.
- Check for any air metering issues that might be prominent at idle.
Adsitco Products: Fuel injectors, vacuum components, MAF sensors, PCV valves and hoses, air flow sensors, intake system components.

Full List of Mercedes-Benz OBD-II Codes Broken Out

This section provides a more detailed listing of OBD-II codes, categorized by code range, with descriptions, possible causes, and solutions.

P0400 Mercedes Fault Codes

P0466 – Purge Flow Sensor Circuit Range/Performance

Description: The Purge Flow Sensor circuit is reporting values outside the expected range or not performing as expected. This sensor measures the flow of fuel vapor from the evaporative emission control system (EVAP) being purged into the intake manifold.
Possible Causes:
- Faulty purge flow sensor.
- Clogged or restricted purge lines or EVAP system components.
- Electrical issues in the sensor circuit (wiring, connectors).
- Vacuum leaks in the EVAP system.
Solutions:
- Replace the purge flow sensor.
- Inspect and clear any blockages in the purge lines and EVAP system.
- Check the electrical circuit for shorts, opens, or poor connections; repair as necessary.
- Check for vacuum leaks in the EVAP system and repair.
Adsitco Products: Purge flow sensors, EVAP system components, vacuum lines, electrical connectors, wiring harnesses.

P0467 – Purge Flow Sensor Circuit Low Input

Description: The Purge Flow Sensor circuit is indicating a low input signal, which often suggests a short circuit to ground in the sensor circuit.
Possible Causes:
- Short circuit to ground in the purge flow sensor wiring.
- Faulty purge flow sensor.
- ECU issue (less likely).
Solutions:
- Inspect the purge flow sensor wiring for shorts to ground; repair any shorts found.
- Replace the purge flow sensor.
- Check ECU functionality if wiring and sensor are okay.
Adsitco Products: Purge flow sensors, wiring harnesses, electrical repair components, ECUs.

P0468 – Purge Flow Sensor Circuit High Input

Description: The Purge Flow Sensor circuit is indicating a high input signal, typically suggesting an open circuit or a short to voltage in the sensor circuit.
Possible Causes:
- Open circuit in the purge flow sensor wiring.
- Short to voltage in the sensor circuit.
- Faulty purge flow sensor.
- ECU issue (less likely).
Solutions:
- Check for open circuits in the purge flow sensor wiring; repair any open circuits.
- Inspect for shorts to voltage; repair if found.
- Replace the purge flow sensor.
- Check ECU functionality if wiring and sensor are okay.
Adsitco Products: Purge flow sensors, wiring harnesses, electrical repair components, ECUs.

P0469 – Purge Flow Sensor Circuit Intermittent

Description: The Purge Flow Sensor circuit is reporting an intermittent signal, meaning the fault is not constant but occurs sporadically.
Possible Causes:
- Loose or corroded electrical connections in the purge flow sensor circuit.
- Intermittent fault in the purge flow sensor itself.
- Wiring issues that intermittently open or short.
Solutions:
- Inspect and secure all electrical connections in the purge flow sensor circuit; clean any corrosion.
- Replace the purge flow sensor.
- Check wiring for intermittent faults by wiggling wires while monitoring sensor readings with a scanner.
Adsitco Products: Purge flow sensors, electrical connectors, wiring components, electrical contact cleaner.

P0470 – Exhaust Pressure Sensor Malfunction

Description: This code indicates a malfunction in the Exhaust Pressure Sensor circuit. This sensor measures the pressure in the exhaust system, often used for diesel particulate filter (DPF) monitoring and exhaust gas recirculation (EGR) control.
Possible Causes:
- Faulty exhaust pressure sensor.
- Exhaust leaks near the sensor.
- Wiring or connector issues to the sensor.
- Clogged or restricted exhaust system.
Solutions:
- Replace the exhaust pressure sensor.
- Check for exhaust leaks near the sensor and repair.
- Inspect wiring and connectors for damage; repair or replace as needed.
- Check for exhaust system restrictions (e.g., clogged catalytic converter or DPF).
Adsitco Products: Exhaust pressure sensors, exhaust system components, wiring harnesses, exhaust repair kits.

P0471 – Exhaust Pressure Sensor Range/Performance

Description: The Exhaust Pressure Sensor is reporting readings that are outside the expected range or not performing as expected.
Possible Causes:
- Faulty exhaust pressure sensor.
- Clogged or restricted exhaust system.
- Wiring or connector issues.
- Exhaust leaks.
Solutions:
- Replace the exhaust pressure sensor.
- Check for exhaust system restrictions.
- Inspect wiring and connectors; repair if necessary.
- Check for exhaust leaks and repair.
Adsitco Products: Exhaust pressure sensors, exhaust system components, wiring harnesses, exhaust repair kits.

P0472 – Exhaust Pressure Sensor Low

Description: The Exhaust Pressure Sensor is indicating a low signal, often pointing to a short circuit to ground in the sensor circuit.
Possible Causes:
- Short circuit to ground in the sensor wiring.
- Faulty exhaust pressure sensor.
- ECU issue (less likely).
Solutions:
- Inspect wiring for shorts to ground; repair any shorts.
- Replace the exhaust pressure sensor.
- Check ECU functionality.
Adsitco Products: Exhaust pressure sensors, wiring harnesses, electrical repair components, ECUs.

P0473 – Exhaust Pressure Sensor High

Description: The Exhaust Pressure Sensor is indicating a high signal, typically suggesting an open circuit or a short to voltage in the sensor circuit.
Possible Causes:
- Open circuit in the sensor wiring.
- Short to voltage in the sensor circuit.
- Faulty exhaust pressure sensor.
- ECU issue (less likely).
Solutions:
- Check for open circuits; repair any opens.
- Inspect for shorts to voltage; repair if found.
- Replace the exhaust pressure sensor.
- Check ECU functionality.
Adsitco Products: Exhaust pressure sensors, wiring harnesses, electrical repair components, ECUs.

P0474 – Exhaust Pressure Sensor Intermittent

Description: The Exhaust Pressure Sensor is reporting intermittent readings, indicating a sporadic fault.
Possible Causes:
- Loose or corroded electrical connections.
- Intermittent fault in the sensor.
- Wiring issues causing intermittent opens or shorts.
Solutions:
- Secure all electrical connections; clean corrosion.
- Replace the exhaust pressure sensor.
- Check wiring for intermittent faults.
Adsitco Products: Exhaust pressure sensors, electrical connectors, wiring components, electrical contact cleaner.

P0475 – Exhaust Pressure Control Valve Malfunction

Description: This code signifies a malfunction in the Exhaust Pressure Control Valve. This valve is used in some vehicles to create back pressure in the exhaust system for purposes like EGR flow control or engine braking.
Possible Causes:
- Faulty exhaust pressure control valve.
- Clogged or restricted exhaust system affecting valve operation.
- Wiring or connector issues to the valve actuator.
- Vacuum or pressure control line issues (if vacuum/pressure actuated).
Solutions:
- Replace the exhaust pressure control valve.
- Check for exhaust system restrictions.
- Inspect wiring and connectors; repair if necessary.
- Check vacuum or pressure control lines for leaks or blockages.
Adsitco Products: Exhaust pressure control valves, exhaust system components, wiring harnesses, vacuum lines.

P0476 – Exhaust Pressure Control Valve Range/Performance

Description: The Exhaust Pressure Control Valve’s performance is outside the expected range.
Possible Causes:
- Sticking or partially functioning control valve.
- Clogged exhaust system.
- Sensor feedback issues.
- Wiring problems.
Solutions:
- Replace or clean the control valve.
- Unclog exhaust system.
- Check associated sensors and wiring.
Adsitco Products: Exhaust valves, sensors, exhaust maintenance kits, wiring harnesses.

P0477 – Exhaust Pressure Control Valve Low

Description: Low signal from the Exhaust Pressure Control Valve circuit.
Possible Causes:
- Short circuit in valve circuit wiring.
- Faulty valve.
Solutions:
- Inspect wiring for shorts.
- Replace the valve.
Adsitco Products: Exhaust pressure control valves, wiring repair components.

P0478 – Exhaust Pressure Control Valve High

Description: High signal from the Exhaust Pressure Control Valve circuit.
Possible Causes:
- Open circuit in valve circuit wiring.
- Faulty valve.
Solutions:
- Check for open circuits.
- Replace the valve.
Adsitco Products: Exhaust pressure control valves, electrical repair kits.

P0479 – Exhaust Pressure Control Valve Intermittent

Description: Intermittent signal from the Exhaust Pressure Control Valve circuit.
Possible Causes:
- Loose connections.
- Intermittent wiring faults.
Solutions:
- Tighten connections.
- Inspect wiring.
Adsitco Products: Electrical connectors, exhaust pressure control valves, wiring components.

P0480 – Cooling Fan 1 Control Circuit Malfunction

Description: Problem in the control circuit of cooling fan 1, which is essential for engine cooling.
Possible Causes:
- Faulty cooling fan relay.
- Wiring issues in the fan control circuit.
- Faulty fan motor.
- Temperature sensor issues.
Solutions:
- Replace the cooling fan relay.
- Inspect and repair wiring in the control circuit.
- Test and replace the fan motor if necessary.
- Check engine coolant temperature sensors.
Adsitco Products: Cooling fan components, relays, wiring harnesses, temperature sensors.

P0481 – Cooling Fan 2 Control Circuit Malfunction

Description: Issue in the control circuit of cooling fan 2 (if vehicle has a second fan), also critical for engine temperature management.
Possible Causes:
- Defective fan relay for fan 2.
- Wiring problems specific to fan 2 control.
- Faulty fan 2 motor.
- Control module issues (less common).
Solutions:
- Replace the fan 2 relay.
- Check and repair wiring for fan 2 control.
- Test and replace fan 2 motor.
- Investigate control module if other solutions fail.
Adsitco Products: Cooling system components, electrical repair parts, fan relays, control modules.

P0482 – Cooling Fan 3 Control Circuit Malfunction

Description: Fault in the control circuit of cooling fan 3 (rare, but possible in some models with multiple fans).
Possible Causes:
- Malfunctioning fan 3 relay.
- Wiring faults in fan 3 circuit.
- Defective fan 3.
- Control system issues.
Solutions:
- Replace fan 3 relay.
- Repair wiring for fan 3.
- Replace fan 3.
- Check overall cooling control system.
Adsitco Products: Cooling fans, fan relays, wiring kits, cooling system control modules.

P0483 – Cooling Fan Rationality Check Malfunction

Description: The cooling fan system is not operating as expected based on engine conditions and sensor readings.
Possible Causes:
- Faulty fan motor.
- Control module issues.
- Temperature sensor faults.
- Wiring or connection problems.
Solutions:
- Replace fan motor.
- Inspect control module.
- Replace temperature sensors.
- Check wiring and connections.
Adsitco Products: Cooling fans, control modules, sensors, wiring components.

P0484 – Cooling Fan Circuit Over Current

Description: The cooling fan circuit is drawing excessive current, indicating a potential overload or short.
Possible Causes:
- Short circuit in fan motor.
- Wiring issues causing increased resistance or shorts.
- Control module faults.
- Overloaded fan motor.
Solutions:
- Inspect and repair wiring.
- Replace fan motor if shorted.
- Check and repair control module.
Adsitco Products: Cooling fans, wiring harnesses, control modules, electrical testing tools.

P0485 – Cooling Fan Power/Ground Circuit Malfunction

Description: Malfunction in the power or ground circuit of the cooling fan, suggesting electrical connection issues.
Possible Causes:
- Faulty electrical connections.
- Damaged wiring.
- Malfunctioning control module.
- Ground circuit issues.
Solutions:
- Check and repair electrical connections.
- Inspect and repair wiring.
- Replace or repair control module.
- Ensure proper grounding.
Adsitco Products: Cooling fans, electrical connectors, wiring harnesses, control modules, grounding straps.

Alt text: Example of a Mercedes-Benz cooling fan assembly, highlighting the fan motor and components that might be related to cooling fan OBD2 codes.

P0500 Mercedes Fault Codes

P0500 – Vehicle Speed Sensor “A” Malfunction

Description: Issue with Vehicle Speed Sensor “A”, which is crucial for speedometer function, transmission shifting, and stability control.
Possible Causes:
- Faulty vehicle speed sensor.
- Damaged wiring or connections.
- Malfunctioning speedometer.
- ECU issues.
Solutions:
- Replace vehicle speed sensor.
- Inspect and repair wiring and connections.
- Check speedometer and ECU.
Adsitco Products: Vehicle speed sensors, wiring harnesses, speedometers, ECUs.

P0501 – Vehicle Speed Sensor “A” Range/Performance

Description: Vehicle Speed Sensor “A” signal is out of expected range or performing erratically.
Possible Causes:
- Malfunctioning vehicle speed sensor.
- Intermittent wiring issues.
- Faulty speedometer.
- ECU problems.
Solutions:
- Replace or recalibrate vehicle speed sensor.
- Check and repair wiring.
- Inspect speedometer and ECU.
Adsitco Products: Vehicle speed sensors, wiring harnesses, speedometers, ECUs.

P0502 – Vehicle Speed Sensor “A” Circuit Low Input

Description: Vehicle Speed Sensor “A” reporting lower than expected voltage, suggesting a short or sensor issue.
Possible Causes:
- Short circuit in speed sensor wiring.
- Faulty vehicle speed sensor.
- ECU issues.
Solutions:
- Inspect and repair wiring for short circuits.
- Replace vehicle speed sensor.
- Check ECU.
Adsitco Products: Vehicle speed sensors, wiring harnesses, ECUs.

P0503 – Vehicle Speed Sensor “A” Intermittent/Erratic/High

Description: Vehicle Speed Sensor “A” providing intermittent, erratic, or overly high readings.
Possible Causes:
- Faulty or intermittent vehicle speed sensor.
- Wiring or connection issues.
- Speedometer or ECU faults.
Solutions:
- Replace vehicle speed sensor.
- Inspect and repair wiring and connections.
- Check speedometer and ECU.
Adsitco Products: Vehicle speed sensors, wiring harnesses, speedometers, ECUs.

P0504 – Brake Switch “A”/”B” Correlation

Description: Mismatch between signals from brake switches A and B, indicating switch failure or wiring issue.
Possible Causes:
- Faulty brake light switch.
- Misaligned or damaged brake light switches.
- Wiring or connector issues.
Solutions:
- Adjust or replace brake light switches.
- Inspect and repair wiring and connectors.
Adsitco Products: Brake light switches, wiring harnesses, connectors.

P0505 – Idle Control System Malfunction

Description: Malfunction in the idle control system, leading to erratic or incorrect idle speed.
Possible Causes:
- Faulty idle air control valve.
- Vacuum leaks.
- Throttle body issues.
- ECU problems.
Solutions:
- Replace or clean idle air control valve.
- Check for and repair vacuum leaks.
- Inspect throttle body and ECU.
Adsitco Products: Idle air control valves, vacuum hoses, throttle bodies, ECUs.

P0506 – Idle Control System RPM Lower Than Expected

Description: Engine idle speed consistently lower than expected, potentially causing stalling.
Possible Causes:
- Dirty or faulty idle air control valve.
- Vacuum leaks.
- Throttle body or ECU issues.
Solutions:
- Clean or replace idle air control valve.
- Repair vacuum leaks.
- Inspect throttle body and ECU.
Adsitco Products: Idle air control valves, vacuum hoses, throttle bodies, ECUs.

P0507 – Idle Control System RPM Higher Than Expected

Description: Engine idle speed consistently higher than expected, affecting vehicle handling.
Possible Causes:
- Sticking idle air control valve.
- Vacuum leaks.
- Throttle body malfunctions.
- ECU issues.
Solutions:
- Replace or clean idle air control valve.
- Check for and repair vacuum leaks.
- Inspect throttle body and ECU.
Adsitco Products: Idle air control valves, vacuum hoses, throttle bodies, ECUs.

P0510 – Closed Throttle Position Switch Malfunction

Description: Throttle position switch not operating as expected when throttle is closed.
Possible Causes:
- Faulty throttle position switch.
- Misaligned or damaged switch.
- Wiring issues.
Solutions:
- Replace or adjust throttle position switch.
- Inspect and repair wiring.
Adsitco Products: Throttle position switches, wiring harnesses.

P0520 – Engine Oil Pressure Sensor/Switch Circuit Malfunction

Description: Malfunction in the circuit of the engine oil pressure sensor or switch.
Possible Causes:
- Faulty oil pressure sensor/switch.
- Wiring or connector issues.
- Engine oil level/quality problems.
Solutions:
- Replace oil pressure sensor/switch.
- Check and repair wiring.
- Ensure correct oil level and quality.
Adsitco Products: Oil pressure sensors/switches, wiring harnesses.

P0521 – Engine Oil Pressure Sensor/Switch Circuit Range/Performance

Description: Engine oil pressure sensor/switch circuit reading outside expected range or performing poorly.
Possible Causes:
- Malfunctioning oil pressure sensor.
- Wiring or connection issues.
- Incorrect engine oil viscosity.
Solutions:
- Replace or recalibrate oil pressure sensor.
- Inspect wiring.
- Use correct oil viscosity.
Adsitco Products: Oil pressure sensors, wiring harnesses.

P0522 – Engine Oil Pressure Sensor/Switch Circuit Low Voltage

Description: Engine oil pressure sensor/switch circuit reporting lower than expected voltage.
Possible Causes:
- Short circuit in oil pressure sensor wiring.
- Faulty sensor.
- Low engine oil level.
Solutions:
- Inspect and repair wiring.
- Replace oil pressure sensor.
- Check and refill engine oil.
Adsitco Products: Oil pressure sensors, wiring harnesses.

P0523 – Engine Oil Pressure Sensor/Switch Circuit High Voltage

Description: Engine oil pressure sensor/switch circuit reporting higher than expected voltage.
Possible Causes:
- Open circuit or poor electrical connection in sensor wiring.
- Faulty sensor.
Solutions:
- Inspect and repair wiring.
- Replace oil pressure sensor.
Adsitco Products: Oil pressure sensors, wiring harnesses.

P0530 – A/C Refrigerant Pressure Sensor Circuit Malfunction

Description: Malfunction in the air conditioning refrigerant pressure sensor circuit.
Possible Causes:
- Faulty A/C refrigerant pressure sensor.
- Wiring or connector issues.
- Refrigerant level problems.
Solutions:
- Replace A/C refrigerant pressure sensor.
- Check and repair wiring.
- Ensure correct refrigerant level.
Adsitco Products: A/C refrigerant pressure sensors, wiring harnesses.

P0531 – A/C Refrigerant Pressure Sensor Circuit Range/Performance

Description: A/C refrigerant pressure sensor circuit reading outside expected range or performing poorly.
Possible Causes:
- Malfunctioning A/C refrigerant pressure sensor.
- Wiring or connection issues.
- Incorrect refrigerant charge.
Solutions:
- Replace or recalibrate A/C refrigerant pressure sensor.
- Inspect wiring.
- Correct refrigerant charge.
Adsitco Products: A/C refrigerant pressure sensors, wiring harnesses.

P0532 – A/C Refrigerant Pressure Sensor Circuit Low Input

Description: A/C refrigerant pressure sensor circuit reporting lower than expected input.
Possible Causes:
- Low refrigerant level.
- Short circuit in sensor wiring.
- Faulty sensor.
Solutions:
- Refill refrigerant.
- Inspect and repair wiring.
- Replace A/C refrigerant pressure sensor.
Adsitco Products: A/C refrigerant pressure sensors, wiring harnesses, refrigerants.

P0533 – A/C Refrigerant Pressure Sensor Circuit High Input

Description: A/C refrigerant pressure sensor circuit reporting higher than expected input.
Possible Causes:
- Overcharged refrigerant system.
- Open circuit or poor electrical connection in sensor wiring.
- Faulty sensor.
Solutions:
- Adjust refrigerant charge.
- Inspect and repair wiring.
- Replace A/C refrigerant pressure sensor.
Adsitco Products: A/C refrigerant pressure sensors, wiring harnesses, refrigerants.

P0534 – Air Conditioner Refrigerant Charge Loss

Description: Detected loss of refrigerant charge in the air conditioning system.
Possible Causes:
- Refrigerant leaks.
- Faulty A/C compressor.
- Damaged A/C system components.
Solutions:
- Check for and repair refrigerant leaks.
- Replace faulty components like A/C compressor.
Adsitco Products: A/C refrigerants, A/C compressors, A/C system components.

P0550 – Power Steering Pressure Sensor Circuit Malfunction

Description: Circuit of the power steering pressure sensor is malfunctioning.
Possible Causes:
- Faulty power steering pressure sensor.
- Wiring or connector issues.
- Power steering fluid level or quality problems.
Solutions:
- Replace power steering pressure sensor.
- Check and repair wiring.
- Ensure correct power steering fluid level and quality.
Adsitco Products: Power steering pressure sensors, wiring harnesses, power steering fluid.

P0551 – Power Steering Pressure Sensor Circuit Range/Performance

Description: Power steering pressure sensor circuit reading outside expected range or performing poorly.
Possible Causes:
- Malfunctioning power steering pressure sensor.
- Wiring or connection issues.
- Power steering pump faults.
Solutions:
- Replace or recalibrate power steering pressure sensor.
- Inspect wiring.
- Check power steering pump.
Adsitco Products: Power steering pressure sensors, wiring harnesses, power steering pumps.

P0552 – Power Steering Pressure Sensor Circuit Low Input

Description: Power steering pressure sensor circuit reporting lower than expected input.
Possible Causes:
- Low power steering fluid level.
- Short circuit in sensor wiring.
- Faulty sensor.
Solutions:
- Refill power steering fluid.
- Inspect and repair wiring.
- Replace power steering pressure sensor.
Adsitco Products: Power steering pressure sensors, wiring harnesses, power steering fluid.

P0553 – Power Steering Pressure Sensor Circuit High Input

Description: Power steering pressure sensor circuit reporting higher than expected input.
Possible Causes:
- Faulty power steering pressure sensor.
- Open circuit or poor electrical connection in sensor wiring.
Solutions:
- Replace power steering pressure sensor.
- Inspect and repair wiring.
Adsitco Products: Power steering pressure sensors, wiring harnesses.

P0554 – Power Steering Pressure Sensor Circuit Intermittent

Description: Power steering pressure sensor circuit experiencing intermittent readings or connectivity.
Possible Causes:
- Intermittent wiring or connection issues.
- Failing power steering pressure sensor.
Solutions:
- Inspect and repair wiring and connections.
- Replace power steering pressure sensor if necessary.
Adsitco Products: Power steering pressure sensors, wiring harnesses.

P0560 – System Voltage Malfunction

Description: Malfunction in the vehicle’s electrical system voltage.
Possible Causes:
- Faulty battery.
- Alternator issues.
- Wiring problems.
Solutions:
- Check and replace battery if necessary.
- Inspect and repair alternator.
- Check wiring.
Adsitco Products: Batteries, alternators, wiring harnesses.

P0561 – System Voltage Unstable

Description: Vehicle’s electrical system voltage is unstable.
Possible Causes:
- Alternator malfunctioning.
- Poor battery condition.
- Electrical system issues.
Solutions:
- Test and replace alternator.
- Inspect battery.
- Check for electrical system faults.
Adsitco Products: Alternators, batteries, electrical system components.

P0562 – System Voltage Low

Description: System voltage lower than expected, indicating charging or electrical issue.
Possible Causes:
- Weak or failing battery.
- Alternator not charging properly.
- Electrical connections issues.
Solutions:
- Test and replace battery.
- Check alternator function.
- Inspect electrical connections.
Adsitco Products: Batteries, alternators, electrical connectors.

P0563 – System Voltage High

Description: System voltage higher than expected, indicating overcharging issue.
Possible Causes:
- Faulty voltage regulator.
- Alternator issues.
- Electrical system malfunctions.
Solutions:
- Replace or repair voltage regulator.
- Inspect alternator.
- Check electrical system.
Adsitco Products: Voltage regulators, alternators, electrical system components.

P0565 – Cruise Control On Signal Malfunction

Description: Malfunction in the “Cruise Control On” signal.
Possible Causes:
- Faulty cruise control switch.
- Wiring issues.
- Cruise control module faults.
Solutions:
- Replace cruise control switch.
- Inspect and repair wiring.
- Check cruise control module.
Adsitco Products: Cruise control switches, wiring harnesses, cruise control modules.

P0566 – Cruise Control Off Signal Malfunction

Description: Malfunction in the “Cruise Control Off” signal.
Possible Causes:
- Faulty cruise control switch.
- Wiring problems.
- Cruise control module defects.
Solutions:
- Replace cruise control switch.
- Check and repair wiring.
- Inspect cruise control module.
Adsitco Products: Cruise control switches, wiring harnesses, cruise control modules.

P0567 – Cruise Control Resume Signal Malfunction

Description: “Cruise Control Resume” signal malfunctioning.
Possible Causes:
- Malfunctioning cruise control switch.
- Wiring issues.
- Faults in cruise control module.
Solutions:
- Replace cruise control switch.
- Inspect and repair wiring.
- Check cruise control module.
Adsitco Products: Cruise control switches, wiring harnesses, cruise control modules.

P0568 – Cruise Control Set Signal Malfunction

Description: Malfunction in the “Cruise Control Set” signal.
Possible Causes:
- Defective cruise control switch.
- Wiring problems.
- Issues with cruise control module.
Solutions:
- Replace cruise control switch.
- Check and repair wiring.
- Inspect cruise control module.
Adsitco Products: Cruise control switches, wiring harnesses, cruise control modules.

P0569 – Cruise Control Coast Signal Malfunction

Description: “Cruise Control Coast” signal malfunctioning.
Possible Causes:
- Faulty cruise control switch.
- Wiring issues.
- Cruise control module problems.
Solutions:
- Replace cruise control switch.
- Inspect and repair wiring.
- Check cruise control module.
Adsitco Products: Cruise control switches, wiring harnesses, cruise control modules.

P0570 – Cruise Control Accel Signal Malfunction

Description: Malfunction in the “Cruise Control Accel” signal.
Possible Causes:
- Malfunctioning cruise control switch.
- Wiring problems.
- Faults in cruise control module.
Solutions:
- Replace cruise control switch.
- Check and repair wiring.
- Inspect cruise control module.
Adsitco Products: Cruise control switches, wiring harnesses, cruise control modules.

P0571 – Cruise Control/Brake Switch A Circuit Malfunction

Description: Malfunction in the circuit of the Cruise Control/Brake Switch A.
Possible Causes:
- Faulty brake switch.
- Wiring or connector issues.
- Cruise control system faults.
Solutions:
- Replace brake switch.
- Inspect and repair wiring.
- Check cruise control system.
Adsitco Products: Brake switches, wiring harnesses, cruise control systems.

P0572 – Cruise Control/Brake Switch A Circuit Low

Description: Cruise Control/Brake Switch A circuit reporting lower than expected voltage.
Possible Causes:
- Short circuit in brake switch wiring.
- Faulty brake switch.
Solutions:
- Inspect and repair wiring.
- Replace brake switch.
Adsitco Products: Brake switches, wiring harnesses.

P0573 – Cruise Control/Brake Switch A Circuit High

Description: Cruise Control/Brake Switch A circuit reporting higher than expected voltage.
Possible Causes:
- Open circuit or poor electrical connection in brake switch wiring.
- Faulty brake switch.
Solutions:
- Inspect and repair wiring.
- Replace brake switch.
Adsitco Products: Brake switches, wiring harnesses.

P0574 to P0580 (P0575, P0576, P0577, P0578, P0579) – Cruise Control Related Malfunctions

Description: Various malfunctions related to the cruise control system.
Possible Causes:
- Varying based on specific code.
- Faulty cruise control module, wiring issues, sensor faults, switch problems.
Solutions:
- Depending on the specific code, solutions may include replacing the cruise control module, repairing wiring, replacing sensors or switches.
Adsitco Products: Cruise control modules, wiring harnesses, sensors, switches.

Alt text: A Mercedes-Benz cruise control switch, a component that can cause OBD2 codes related to cruise control malfunctions.

P0600 Mercedes Fault Codes

P0600 – Serial Communication Link Malfunction

Description: Serial Communication Link malfunction, indicating issues with communication between control modules.
Possible Causes:
- Faulty wiring.
- Poor electrical connections.
- Control module communication problems.
Solutions:
- Inspect and repair wiring.
- Ensure proper electrical connections.
- Diagnose and address control module communication problems.
Adsitco Products: Wiring harnesses, control modules.

P0601 – Internal Control Module Memory Check Sum Error

Description: Internal control module memory check sum error, indicating memory-related issue.
Possible Causes:
- Faulty control module memory.
- Programming errors.
Solutions:
- Evaluate and potentially replace control module.
- Reprogram as necessary.
Adsitco Products: Control modules.

P0602 – Control Module Programming Error

Description: Control module reporting a programming error.
Possible Causes:
- Incorrect programming.
- Issues with software.
Solutions:
- Reprogram control module with correct software.
- Ensure proper programming procedures are followed.
Adsitco Products: Control modules, programming tools.

P0603 – Internal Control Module Keep Alive Memory (KAM) Error

Description: Internal control module Keep Alive Memory (KAM) error, indicating memory retention problems.
Possible Causes:
- Faulty control module KAM.
- Wiring issues.
Solutions:
- Evaluate and potentially replace control module.
- Inspect and repair wiring.
Adsitco Products: Control modules, wiring harnesses.

P0604 – Internal Control Module Random Access Memory (RAM) Error

Description: Internal control module reporting a Random Access Memory (RAM) error.
Possible Causes:
- Faulty control module RAM.
- Wiring issues.
Solutions:
- Evaluate and potentially replace control module.
- Inspect and repair wiring.
Adsitco Products: Control modules, wiring harnesses.

P0605 – Internal Control Module Read Only Memory (ROM) Error

Description: Internal control module reporting a Read Only Memory (ROM) error.
Possible Causes:
- Faulty control module ROM.
- Wiring issues.
Solutions:
- Evaluate and potentially replace control module.
- Inspect and repair wiring.
Adsitco Products: Control modules, wiring harnesses.

P0606 – PCM Processor Fault

Description: Powertrain Control Module (PCM) reporting a processor fault.
Possible Causes:
- Faulty PCM.
- Wiring issues.
Solutions:
- Evaluate and potentially replace PCM.
- Inspect and repair wiring.
Adsitco Products: PCM, wiring harnesses.

P0608 – Control Module VSS Output “A” Malfunction

Description: Control module reporting a Vehicle Speed Sensor (VSS) Output “A” malfunction.
Possible Causes:
- Faulty VSS.
- Wiring issues.
Solutions:
- Evaluate and potentially replace VSS.
- Inspect and repair wiring.
Adsitco Products: Vehicle Speed Sensors, wiring harnesses.

P0609 – Control Module VSS Output “B” Malfunction

Description: Control module reporting a Vehicle Speed Sensor (VSS) Output “B” malfunction.
Possible Causes:
- Faulty VSS.
- Wiring issues.
Solutions:
- Evaluate and potentially replace VSS.
- Inspect and repair wiring.
Adsitco Products: Vehicle Speed Sensors, wiring harnesses.

P0620 – Generator Control Circuit Malfunction

Description: Generator control circuit experiencing a malfunction.
Possible Causes:
- Faulty generator.
- Wiring issues.
Solutions:
- Evaluate and potentially replace generator.
- Inspect and repair wiring.
Adsitco Products: Generators, wiring harnesses.

P0621 – Generator Lamp “L” Control Circuit Malfunction

Description: Generator lamp “L” control circuit reporting a malfunction.
Possible Causes:
- Faulty generator lamp.
- Wiring issues.
Solutions:
- Evaluate and potentially replace generator lamp.
- Inspect and repair wiring.
Adsitco Products: Generator lamps, wiring harnesses.

P0622 – Generator Field “F” Control Circuit Malfunction

Description: Generator field “F” control circuit reporting a malfunction.
Possible Causes:
- Faulty generator field control.
- Wiring issues.
Solutions:
- Evaluate and potentially replace generator field control.
- Inspect and repair wiring.
Adsitco Products: Generator field controls, wiring harnesses.

P0650 – Malfunction Indicator Lamp (MIL) Control Circuit Malfunction

Description: Malfunction Indicator Lamp (MIL) control circuit reporting a malfunction.
Possible Causes:
- Faulty MIL.
- Wiring issues.
Solutions:
- Evaluate and potentially replace MIL.
- Inspect and repair wiring.
Adsitco Products: Malfunction Indicator Lamps, wiring harnesses.

P0654 – Engine RPM Output Circuit Malfunction

Description: Engine RPM output circuit reporting a malfunction.
Possible Causes:
- Faulty RPM sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace RPM sensor.
- Inspect and repair wiring.
Adsitco Products: RPM sensors, wiring harnesses.

P0655 – Engine Hot Lamp Output Control Circuit Malfunction

Description: Engine Hot Lamp output control circuit reporting a malfunction.
Possible Causes:
- Faulty engine hot lamp.
- Wiring issues.
Solutions:
- Evaluate and potentially replace engine hot lamp.
- Inspect and repair wiring.
Adsitco Products: Engine hot lamps, wiring harnesses.

P0656 – Fuel Level Output Circuit Malfunction

Description: Fuel level output circuit reporting a malfunction.
Possible Causes:
- Faulty fuel level sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace fuel level sensor.
- Inspect and repair wiring.
Adsitco Products: Fuel level sensors, wiring harnesses.

P0700 Mercedes Fault Codes

P0700 – Transmission Control System Malfunction

Description: Transmission Control System malfunction, indicating general issues with transmission control.
Possible Causes:
- Wiring issues.
- Faulty transmission control module.
- Sensor problems.
Solutions:
- Inspect and repair wiring.
- Evaluate and potentially replace transmission control module.
- Address sensor issues.
Adsitco Products: Transmission control modules, wiring harnesses, sensors.

P0701 – Transmission Control System Range/Performance

Description: Transmission Control System reporting a range/performance issue.
Possible Causes:
- Faulty transmission control module.
- Sensor problems.
Solutions:
- Evaluate and potentially replace transmission control module.
- Address sensor issues.
Adsitco Products: Transmission control modules, sensors.

P0702 – Transmission Control System Electrical

Description: Transmission Control System reporting an electrical issue.
Possible Causes:
- Wiring issues.
- Faulty transmission control module.
- Sensor problems.
Solutions:
- Inspect and repair wiring.
- Evaluate and potentially replace transmission control module.
- Address sensor issues.
Adsitco Products: Transmission control modules, wiring harnesses, sensors.

P0703 – Torque Converter/Brake Switch B Circuit Malfunction

Description: Torque Converter/Brake Switch B circuit reporting a malfunction.
Possible Causes:
- Open circuit or poor electrical connection in brake switch wiring.
- Faulty torque converter or brake switch.
Solutions:
- Inspect and repair wiring.
- Evaluate and potentially replace torque converter or brake switch.
Adsitco Products: Torque converters, brake switches, wiring harnesses.

P0704 – Clutch Switch Input Circuit Malfunction

Description: Clutch Switch Input circuit reporting a malfunction.
Possible Causes:
- Open circuit or poor electrical connection in clutch switch wiring.
- Faulty clutch switch.
Solutions:
- Inspect and repair wiring.
- Evaluate and potentially replace clutch switch.
Adsitco Products: Clutch switches, wiring harnesses.

P0705 – Transmission Range Sensor Circuit malfunction (PRNDL Input)

Description: Transmission Range Sensor circuit malfunction (PRNDL Input).
Possible Causes:
- Faulty transmission range sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace transmission range sensor.
- Inspect and repair wiring.
Adsitco Products: Transmission range sensors, wiring harnesses.

P0706 – Transmission Range Sensor Circuit Range/Performance

Description: Transmission Range Sensor circuit range/performance issue (PRNDL Input).
Possible Causes:
- Faulty transmission range sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace transmission range sensor.
- Inspect and repair wiring.
Adsitco Products: Transmission range sensors, wiring harnesses.

P0707 – Transmission Range Sensor Circuit Low Input

Description: Transmission Range Sensor circuit low input (PRNDL Input).
Possible Causes:
- Faulty transmission range sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace transmission range sensor.
- Inspect and repair wiring.
Adsitco Products: Transmission range sensors, wiring harnesses.

P0708 – Transmission Range Sensor Circuit High Input

Description: Transmission Range Sensor circuit high input (PRNDL Input).
Possible Causes:
- Faulty transmission range sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace transmission range sensor.
- Inspect and repair wiring.
Adsitco Products: Transmission range sensors, wiring harnesses.

P0709 – Transmission Range Sensor Circuit Intermittent

Description: Transmission Range Sensor circuit intermittent issue (PRNDL Input).
Possible Causes:
- Faulty transmission range sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace transmission range sensor.
- Inspect and repair wiring.
Adsitco Products: Transmission range sensors, wiring harnesses.

P0710 – Transmission Fluid Temperature Sensor Circuit Malfunction

Description: Transmission Fluid Temperature Sensor circuit malfunction.
Possible Causes:
- Faulty transmission fluid temperature sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace transmission fluid temperature sensor.
- Inspect and repair wiring.
Adsitco Products: Transmission fluid temperature sensors, wiring harnesses.

P0711 – Transmission Fluid Temperature Sensor Circuit Range/Performance

Description: Transmission Fluid Temperature Sensor circuit range/performance issue.
Possible Causes:
- Faulty transmission fluid temperature sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace transmission fluid temperature sensor.
- Inspect and repair wiring.
Adsitco Products: Transmission fluid temperature sensors, wiring harnesses.

P0712 – Transmission Fluid Temperature Sensor Circuit Low Input

Description: Transmission Fluid Temperature Sensor circuit low input.
Possible Causes:
- Faulty transmission fluid temperature sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace transmission fluid temperature sensor.
- Inspect and repair wiring.
Adsitco Products: Transmission fluid temperature sensors, wiring harnesses.

P0713 – Transmission Fluid Temperature Sensor Circuit High Input

Description: Transmission Fluid Temperature Sensor circuit high input.
Possible Causes:
- Faulty transmission fluid temperature sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace transmission fluid temperature sensor.
- Inspect and repair wiring.
Adsitco Products: Transmission fluid temperature sensors, wiring harnesses.

P0714 – Transmission Fluid Temperature Sensor Circuit Intermittent

Description: Transmission Fluid Temperature Sensor circuit intermittent issue.
Possible Causes:
- Faulty transmission fluid temperature sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace transmission fluid temperature sensor.
- Inspect and repair wiring.
Adsitco Products: Transmission fluid temperature sensors, wiring harnesses.

P0715 – Input/Turbine Speed Sensor Circuit Malfunction

Description: Input/Turbine Speed Sensor circuit malfunction.
Possible Causes:
- Faulty input/turbine speed sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace input/turbine speed sensor.
- Inspect and repair wiring.
Adsitco Products: Input/turbine speed sensors, wiring harnesses.

P0716 – Input/Turbine Speed Sensor Circuit Range/Performance

Description: Input/Turbine Speed Sensor circuit range/performance issue.
Possible Causes:
- Faulty input/turbine speed sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace input/turbine speed sensor.
- Inspect and repair wiring.
Adsitco Products: Input/turbine speed sensors, wiring harnesses.

P0717 – Input/Turbine Speed Sensor Circuit No Signal

Description: Input/Turbine Speed Sensor circuit no signal.
Possible Causes:
- Faulty input/turbine speed sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace input/turbine speed sensor.
- Inspect and repair wiring.
Adsitco Products: Input/turbine speed sensors, wiring harnesses.

P0718 – Input/Turbine Speed Sensor Circuit Intermittent

Description: Input/Turbine Speed Sensor circuit intermittent issue.
Possible Causes:
- Faulty input/turbine speed sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace input/turbine speed sensor.
- Inspect and repair wiring.
Adsitco Products: Input/turbine speed sensors, wiring harnesses.

P0719 – Torque Converter/Brake Switch B Circuit Low

Description: Torque Converter/Brake Switch B circuit low input.
Possible Causes:
- Open circuit or poor electrical connection in brake switch wiring.
- Faulty torque converter or brake switch.
Solutions:
- Inspect and repair wiring.
- Evaluate and potentially replace torque converter or brake switch.
Adsitco Products: Torque converters, brake switches, wiring harnesses.

P0720 – Output Speed Sensor Circuit Malfunction

Description: Output Speed Sensor circuit malfunction.
Possible Causes:
- Faulty output speed sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace output speed sensor.
- Inspect and repair wiring.
Adsitco Products: Output speed sensors, wiring harnesses.

P0721 – Output Speed Sensor Range/Performance

Description: Output Speed Sensor circuit range/performance issue.
Possible Causes:
- Faulty output speed sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace output speed sensor.
- Inspect and repair wiring.
Adsitco Products: Output speed sensors, wiring harnesses.

P0722 – Output Speed Sensor No Signal

Description: Output Speed Sensor circuit no signal.
Possible Causes:
- Faulty output speed sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace output speed sensor.
- Inspect and repair wiring.
Adsitco Products: Output speed sensors, wiring harnesses.

P0723 – Output Speed Sensor Intermittent

Description: Output Speed Sensor circuit intermittent issue.
- Possible Causes:
- Faulty output speed sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace output speed sensor.
- Inspect and repair wiring.
Adsitco Products: Output speed sensors, wiring harnesses.

P0724 – Torque Converter/Brake Switch B Circuit High

Description: Torque Converter/Brake Switch B circuit high input.
Possible Causes:
- Open circuit or poor electrical connection in brake switch wiring.
- Faulty torque converter or brake switch.
Solutions:
- Inspect and repair wiring.
- Evaluate and potentially replace torque converter or brake switch.
Adsitco Products: Torque converters, brake switches, wiring harnesses.

P0725 – Engine Speed input Circuit Malfunction

Description: Engine Speed input Circuit Malfunction.
Possible Causes:
- Faulty engine speed sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace engine speed sensor.
- Inspect and repair wiring.
Adsitco Products: Engine speed sensors, wiring harnesses.

P0726 – Engine Speed Input Circuit Range/Performance

Description: Engine Speed Input circuit range/performance issue.
Possible Causes:
- Faulty engine speed sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace engine speed sensor.
- Inspect and repair wiring.
Adsitco Products: Engine speed sensors, wiring harnesses.

P0727 – Engine Speed Input Circuit No Signal

Description: Engine Speed Input circuit no signal.
Possible Causes:
- Faulty engine speed sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace engine speed sensor.
- Inspect and repair wiring.
Adsitco Products: Engine speed sensors, wiring harnesses.

P0728 – Engine Speed Input Circuit Intermittent

Description: Engine Speed Input circuit intermittent issue.
Possible Causes:
- Faulty engine speed sensor.
- Wiring issues.
Solutions:
- Evaluate and potentially replace engine speed sensor.
- Inspect and repair wiring.
Adsitco Products: Engine speed sensors, wiring harnesses.

P0730 – Incorrect Gear Ratio

Description: Incorrect gear ratio detected by the transmission.
Possible Causes:
- Faulty sensors.
- Issues with transmission components.
Solutions:
- Evaluate and potentially replace sensors.
- Inspect and repair transmission components.
Adsitco Products: Sensors, transmission components.

P0731 to P0736 – Gear 1 to Reverse Incorrect Ratio

Description: Gear 1, Gear 2, Gear 3, Gear 4, Gear 5, Reverse gear reporting incorrect ratio.
Possible Causes:
- Faulty sensors.
- Issues with transmission components affecting specific gears.
Solutions:
- Evaluate and potentially replace sensors.
- Inspect and repair transmission components related to the specified gear.
Adsitco Products: Sensors, transmission components.

P0740 to P0744 – Torque Converter Clutch Circuit Malfunctions

Description: Torque Converter Clutch Circuit Malfunction, Performance or Stuck Off, Stuck On, Electrical, Intermittent.
Possible Causes:
- Faulty torque converter.
- Wiring issues.
Solutions:
- Evaluate and potentially replace torque converter.
- Inspect and repair wiring.
Adsitco Products: Torque converters, wiring harnesses.

P0745 to P0749 – Pressure Control Solenoid Malfunctions

Description: Pressure Control Solenoid Malfunction, Performance or Stuck Off, Stuck On, Electrical, Intermittent.
Possible Causes:
- Faulty pressure control solenoid.
- Wiring issues.
Solutions:
- Evaluate and potentially replace pressure control solenoid.
- Inspect and repair wiring.
Adsitco Products: Pressure control solenoids, wiring harnesses.

P0750 to P0774 – Shift Solenoid A to E Malfunctions

Description: Shift Solenoid A, B, C, D, E Malfunction, Performance or Stuck Off, Stuck On, Electrical, Intermittent.
Possible Causes:
- Faulty shift solenoids.
- Wiring issues.
Solutions:
- Evaluate and potentially replace shift solenoids.
- Inspect and repair wiring.
Adsitco Products: Shift solenoids, wiring harnesses.

P0780 to P0784 – Shift Malfunctions (General, 1-2, 2-3, 3-4, 4-5)

Description: Shift Malfunction (General, 1-2, 2-3, 3-4, 4-5 shift issues).
Possible Causes:
- Faulty sensors.
- Issues with transmission components.
Solutions:
- Evaluate and potentially replace sensors.
- Inspect and repair transmission components.
Adsitco Products: Sensors, transmission components.

P0785 to P0789 – Shift/Timing Solenoid Malfunctions

Description: Shift/Timing Solenoid Malfunction, Range/Performance, Low, High, Intermittent.
Possible Causes:
- Faulty Shift/Timing Solenoid.
- Wiring issues.
Solutions:
- Evaluate and potentially replace Shift/Timing Solenoid.
- Inspect and repair wiring.
Adsitco Products: Shift/Timing Solenoids, wiring harnesses.

P0790 – Normal/Performance Switch Circuit Malfunction

Description: Normal/Performance Switch Circuit Malfunction.
Possible Causes:
- Faulty switch.
- Wiring issues.
Solutions:
- Evaluate and potentially replace switch.
- Inspect and repair wiring.
Adsitco Products: Switches, wiring harnesses.

P0800 Mercedes Fault Codes

P0801 – Reverse Inhibit Control Circuit Malfunction

Description: Reverse Inhibit Control Circuit Malfunction, affecting reverse gear engagement safety.
Possible Causes:
- Faulty control solenoid.
- Wiring issues.
- ECM problems.
Solutions:
- Replace control solenoid.
- Check and repair wiring.
- ECM diagnostics and repair.
Adsitco Products: Solenoids, wiring harnesses, ECM components.

P0803 – 1-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction

Description: 1-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction, affecting gear transition efficiency.
Possible Causes:
- Faulty skip shift solenoid.
- Damaged wiring.
- Poor solenoid connection.
Solutions:
- Replace skip shift solenoid.
- Repair damaged wiring.
- Ensure secure connections.
Adsitco Products: Skip shift solenoids, wiring harnesses.

P0804 – 1-4 Upshift (Skip Shift) Lamp Control Circuit Malfunction

Description: 1-4 Upshift (Skip Shift) Lamp Control Circuit Malfunction, affecting indicator lamp function.
Possible Causes:
- Faulty lamp or control circuit.
- Wiring issues.
Solutions:
- Check and replace lamp.
- Repair or replace control circuit components.
- Fix wiring issues.
Adsitco Products: Indicator lamps, wiring harnesses.

P0805 – Clutch Position Sensor Circuit Malfunction

Description: Clutch Position Sensor Circuit Malfunction, affecting clutch position detection.
Possible Causes:
- Faulty clutch position sensor.
- Wiring issues.
- Bad connection.
Solutions:
- Replace clutch position sensor.
- Inspect and repair wiring.
- Ensure secure connections.
Adsitco Products: Clutch position sensors, wiring harnesses.

P0806 – Clutch Position Sensor Circuit Range/Performance

Description: Clutch Position Sensor Circuit Range/Performance issue, leading to potential transmission problems.
Possible Causes:
- Misadjusted clutch position sensor.
- Faulty sensor.
- Wiring problems.
Solutions:
- Adjust clutch position sensor.
- Replace faulty sensor.
- Repair wiring issues.
Adsitco Products: Clutch position sensors, wiring harnesses.

P0807 – Clutch Position Sensor Circuit Low

Description: Clutch Position Sensor Circuit Low input signal, suggesting a short or malfunction.
Possible Causes:
- Short to ground in sensor circuit.
- Faulty sensor.
Solutions:
- Inspect circuit for shorts.
- Replace clutch position sensor.
Adsitco Products: Clutch position sensors, wiring harnesses.

P0808 – Clutch Position Sensor Circuit High

Description: Clutch Position Sensor Circuit High input signal, suggesting an open or malfunction.
Possible Causes:
- Open in sensor circuit.
- Faulty sensor.
Solutions:
- Check circuit for opens.
- Replace clutch position sensor.
Adsitco Products: Clutch position sensors, wiring harnesses.

P0809 – Clutch Position Sensor Circuit Intermittent Ckt

Description: Clutch Position Sensor Circuit Intermittent signals, leading to unpredictable vehicle performance.
Possible Causes:
- Loose or corroded connections.
- Intermittent sensor failure.
- Wiring issues.
Solutions:
- Check and secure connections.
- Replace sensor if intermittently failing.
- Repair or replace damaged wiring.
Adsitco Products: Clutch position sensors, wiring harnesses, connector kits.

P0810 – Clutch Position Control Malfunction

Description: Clutch Position Control Malfunction, affecting clutch engagement and disengagement.
Possible Causes:
- Faulty clutch actuator.
- Malfunctioning clutch position sensor.
- ECM issues.
Solutions:
- Inspect and replace clutch actuator.
- Test and replace clutch position sensor.
- Diagnose ECM for errors.
Adsitco Products: Clutch actuators, clutch position sensors, ECM components.

P0811 – Clutch Slippage Excessive

Description: Clutch Slippage Excessive detected, leading to wear and tear on transmission.
Possible Causes:
- Worn clutch components.
- Improper clutch adjustment.
- Hydraulic system issues.
Solutions:
- Replace worn clutch components.
- Adjust clutch mechanism.
- Inspect hydraulic system.
Adsitco Products: Clutch kits, hydraulic system components.

P0812 – Reverse Input Circuit Malfunction

Description: Reverse Input Circuit Malfunction, affecting reverse gear recognition.
Possible Causes:
- Faulty reverse gear switch.
- Wiring issues.
- Bad connection.
Solutions:
- Replace reverse gear switch.
- Inspect and repair wiring.
- Ensure secure connections.
Adsitco Products: Reverse gear switches, wiring harnesses.

P0813 – Reverse Output Circuit Malfunction

Description: Reverse Output Circuit Malfunction, impacting reverse gear signal or action.
Possible Causes:
- Faulty output sensors or circuits.
- Wiring issues.
Solutions:
- Inspect and potentially replace output sensors or related circuit components.
- Repair wiring.
Adsitco Products: Sensors, wiring harnesses.

P0814 – Trans Range Display Circuit Malfunction

Description: Trans Range Display Circuit Malfunction, potentially leading to incorrect gear display.
Possible Causes:
- Faulty transmission range sensor.
- Display issues.
- Wiring malfunctions.
Solutions:
- Replace transmission range sensor.
- Repair or replace display unit.
- Fix wiring problems.
Adsitco Products: Transmission range sensors, display units, wiring harnesses.

P0815 – Upshift Switch Circuit Malfunction

Description: Upshift Switch Circuit Malfunction, affecting manual gear selection or shift signals.
Possible Causes:
- Faulty upshift switch.
- Wiring or connector issues.
Solutions:
- Replace upshift switch.
- Inspect and repair wiring and connectors.
Adsitco Products: Shift switches, wiring harnesses, connectors.

P0816 – Downshift Switch Circuit Malfunction

Description: Downshift Switch Circuit Malfunction, affecting gear selection and transmission performance.
Possible Causes:
- Faulty downshift switch.
- Wiring or connector issues.
Solutions:
- Replace downshift switch.
- Check and repair wiring and connector problems.
Adsitco Products: Shift switches, wiring harnesses, connectors.

P0817 – Starter Disable Circuit

Description: Starter Disable Circuit issue, possibly preventing engine from starting.
Possible Causes:
- Faulty relay or control module.
- Wiring issues.
- Security system malfunction.
Solutions:
- Inspect and replace relay or control module.
- Repair wiring.
- Diagnose security system.
Adsitco Products: Relays, control modules, security system components.

P0818 – Driveline Disconnect Switch Input

Description: Driveline Disconnect Switch Input issue, affecting driveline engagement or disengagement.
Possible Causes:
- Faulty switch.
- Wiring issues.
- ECM problems.
Solutions:
- Replace switch.
- Inspect and repair wiring.
- Check ECM for related faults.
Adsitco Products: Switches, wiring harnesses, ECM components.

P0820 to P0824 – Gear Lever Sensor Circuit Malfunctions

Description: Gear Lever X-Y Sensor Circuit, Gear Lever X Sensor Circuit, Gear Lever Y Sensor Circuit, and their Intermittent Ckt Malfunctions, affecting gear lever position detection.
Possible Causes:
- Faulty gear position sensor.
- Wiring or connector issues.
- Loose connections.
- Intermittent sensor faults.
Solutions:
- Replace gear position sensor.
- Inspect and repair wiring and connectors.
- Secure all connections.
- Replace sensor if intermittently failing.
Adsitco Products: Gear position sensors, wiring harnesses, connectors, connector kits.

P0830 to P0835 – Clutch Position Switch Circuit Malfunctions

Description: Clutch Position Switch A Circuit Malfunction, Circuit Low, Circuit High, Clutch Position Switch B Circuit Malfunction, Circuit Low, Circuit High, affecting clutch operation.
Possible Causes:
- Faulty clutch position switch.
- Wiring or connector issues.
- Short circuit, Open circuit.
Solutions:
- Replace clutch position switch.
- Inspect and repair wiring and connectors.
- Inspect for shorts to ground, open circuits.
Adsitco Products: Clutch position switches, wiring harnesses, connectors.

P0836 to P0839 – 4 Wheel Drive Switch Circuit Malfunctions

Description: 4 Wheel Drive Switch Circuit Malfunction, CKT Range/Perf, Circuit Low, Circuit High, affecting 4WD system operation.
Possible Causes:
- Faulty 4WD switch.
- Wiring issues.
- Transfer case problems.
- Maladjusted switch.
- Short circuit, Open circuit.
Solutions:
- Replace 4WD switch.
- Inspect and repair wiring.
- Diagnose transfer case.
- Adjust or replace 4WD switch.
- Inspect for shorts to ground, open circuits.
Adsitco Products: 4WD switches, wiring harnesses, transfer case components.

P0840 to P0849 – Trans Fluid Press Sensor/Switch A & B Circuit Malfunctions

Description: Trans Fluid Press Sensor/Switch A Circuit Malfunction, CKT Range/Perf, Circuit Low, Circuit High, CKT Intermittent, Trans Fluid Press Sensor/Switch B Circuit Malfunction, CKT Range/Perf, Circuit Low, Circuit High, CKT Intermittent, affecting transmission fluid pressure readings and transmission operation.
Possible Causes:
- Faulty sensor/switch.
- Wiring or connector issues.
- Hydraulic problems.
- Fluid level or quality issues.
- Electrical short, Electrical open.
- Loose connections.
Solutions:
- Replace sensor/switch.
- Repair wiring or connector problems.
- Diagnose hydraulic system.
- Check and correct fluid level and quality.
- Inspect for electrical shorts, open circuits.
- Secure all connections.
Adsitco Products: Pressure sensors/switches, wiring harnesses, hydraulic system components, transmission fluids, connector kits.

P1000-P2000 Mercedes Fault Codes

P1000 – Electronic Gear Selector Module: Defective N15/5

Description: Fault in the electronic gear selector module, specifically component N15/5, affecting gear selection.
Possible Causes:
- Faulty gear selector module.
- Wiring issues.
- CAN communication problems.
Solutions:
- Replace electronic gear selector module.
- Inspect and repair wiring.
- Diagnose CAN communication issues.
Adsitco Products: Gear selector modules, wiring harnesses.

P1228 – yet unknown code on 1997 C 220 CDI

Description: Undefined code, likely specific to 1997 C 220 CDI, possibly related to fuel or engine management.
Possible Causes:
- Unspecified, could be fuel system, sensors, or ECM issues.
Solutions:
- Comprehensive diagnostics to identify root cause.
- Targeted repairs or component replacement.
Adsitco Products: Fuel system components, sensors, ECM units.

P1386 – Knock Control

Description: Problem with the knock control system, affecting engine performance and efficiency.
Possible Causes:
- Faulty knock sensors.
- Improper fuel octane.
- Engine mechanical issues.
Solutions:
- Replace faulty knock sensors.
- Ensure use of correct fuel octane.
- Inspect engine for mechanical problems.
Adsitco Products: Knock sensors, engine components.

P1570 – Intermittent No-Start Immobiliser Module

Description: Intermittent issues with immobilizer module, leading to occasional no-start conditions.
Possible Causes:
- Faulty immobilizer module.
- Wiring issues.
- Key fob problems.
Solutions:
- Replace or reprogram immobilizer module.
- Repair wiring.
- Check or replace key fob.
Adsitco Products: Immobilizer modules, wiring harnesses, key fobs.

P1747 – Electronic Gear Selector Module: Defective Interaction of CAN with control unit A1 (instrument cluster)

Description: Fault in CAN communication between gear selector module and instrument cluster.
Possible Causes:
- Faulty gear selector module.
- Instrument cluster issues.
- CAN communication faults.
Solutions:
- Replace defective modules.
- Diagnose and repair CAN communication issues.
Adsitco Products: Gear selector modules, instrument clusters, wiring harnesses.

P1750 – Electronic Gear Selector Module: Very low control unit supply voltage

Description: Low supply voltage to electronic gear selector module control unit.
Possible Causes:
- Weak battery.
- Poor connections.
- Faulty wiring.
Solutions:
- Test and replace battery.
- Check connections and wiring.
- Repair or replace as needed.
Adsitco Products: Batteries, wiring harnesses, connectors.

P1832 – Electronic Gear Selector Module: SHORT in circuit N15/5 output stage

Description: Short circuit in output stage of electronic gear selector module.
Possible Causes:
- Short circuit within module or wiring.
- Faulty gear selector module.
Solutions:
- Inspect for short circuits and repair.
- Replace gear selector module.
Adsitco Products: Gear selector modules, wiring harnesses.

P1910 – Electronic Gear Selector Module: Control Unit over voltage

Description: Over-voltage condition in electronic gear selector module control unit.
Possible Causes:
- Faulty voltage regulator.
- Electrical system issues.
- Improper charging.
Solutions:
- Check and replace voltage regulator.
- Diagnose and repair electrical system issues.
Adsitco Products: Voltage regulators, electrical system components.

P1912 – Electronic Gear Selector Module: Weak touch push button voltage

Description: Low voltage at touch push button of electronic gear selector module.
Possible Causes:
- Faulty button.
- Wiring issues.
- Low voltage supply.
Solutions:
- Replace faulty button.
- Inspect and repair wiring.
- Ensure adequate voltage supply.
Adsitco Products: Gear selector module components, wiring harnesses.

P2000 to P2004 – NOx/Particulate Trap Efficiency Below Threshold (Bank 1 & 2)

Description: NOx or Particulate Trap Efficiency Below Threshold for Bank 1 or Bank 2, affecting emissions control.
Possible Causes:
- Faulty NOx trap/particulate filter.
- Sensor issues.
- Exhaust leaks.
Solutions:
- Replace NOx trap or particulate filter.
- Repair exhaust leaks.
- Replace faulty sensors.
Adsitco Products: NOx traps, particulate filters, exhaust system components, sensors.

P2031 to P2033 – Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 2)

Description: Exhaust Gas Temperature Sensor Circuit issues for Bank 1 Sensor 2, affecting temperature readings and emissions control.
Possible Causes:
- Faulty sensor.
- Wiring or connector issues.
- Exhaust system problems.
Solutions:
- Replace exhaust gas temperature sensor.
- Inspect and repair wiring and connectors.
- Check exhaust system for issues.
Adsitco Products: Exhaust gas temperature sensors, wiring harnesses, exhaust system components.

P2080, P2081 – Exhaust Gas Temperature Sensor Circuit Range/Performance & Intermittent (Bank 1 Sensor 1)

Description: Exhaust Gas Temperature Sensor Circuit Range/Performance or Intermittent operation for Bank 1 Sensor 1, affecting sensor accuracy.
Possible Causes:
- Faulty sensor.
- Intermittent wiring or connector problems.
- Exhaust system issues.
Solutions:
- Replace exhaust gas temperature sensor.
- Repair wiring or connector issues.
- Inspect exhaust system.
Adsitco Products: Exhaust gas temperature sensors, wiring harnesses, exhaust components.

P2100, P2101 – Throttle Actuator Control Motor Circuit/Open & Range/Performance

Description: Throttle Actuator Control Motor Circuit issues, affecting throttle response and engine power.
Possible Causes:
- Faulty throttle actuator.
- Wiring or connector issues.
- ECM faults.
Solutions:
- Replace throttle actuator.
- Inspect and repair wiring and connectors.
- Diagnose ECM for issues.
Adsitco Products: Throttle actuators, wiring harnesses, ECM units.

P2208 – Transmission: The speed of Y3/6n2 to Y3/6n3 is excessive

Description: Transmission issue with excessive speed difference between sensors Y3/6n2 and Y3/6n3.
Possible Causes:
- Faulty transmission speed sensors.
- Internal transmission issues.
- ECM problems.
Solutions:
- Replace faulty speed sensors.
- Inspect transmission for internal problems.
- Diagnose ECM for faults.
Adsitco Products: Transmission speed sensors, ECM components, transmission parts.

Mercedes Body Fault Codes

B1000 – HRA Headlamp Range Adjustment: Supply Voltage Too Low (Undervoltage)

Description: Undervoltage in Headlamp Range Adjustment (HRA) system.
Possible Causes:
- Low vehicle battery voltage.
- Faulty wiring to control unit.
- Defective control unit.
Solutions:
- Check and charge battery.
- Inspect wiring.
- Replace control unit.
Adsitco Products: Control units, wiring harnesses.

B1004 – LCP Lower Control Panel: Control Unit Does Not Match Vehicle Type

Description: Incompatible Lower Control Panel (LCP) control unit installed.
Possible Causes:
- Incorrect control unit installed.
Solutions:
- Verify and replace with correct control unit.
Adsitco Products: Control units for lower control panel.

B1056 – Automatic Air Conditioning: Problem in CAN Communication with Control Unit DCM-RL

Description: CAN communication issue between A/C and Door Control Module Rear Left (DCM-RL).
Possible Causes:
- Faulty CAN wiring.
- Defective DCM-RL control unit.
Solutions:
- Check CAN wiring and connections.
- Replace DCM-RL control unit.
Adsitco Products: DCM-RL control units, CAN network wiring.

B1201 – Electric Seat Adjustment Front Left: Hall Sensor Front Height M27m3

Description: Faulty hall sensor for front height adjustment of front left electric seat.
Possible Causes:
- Faulty hall sensor.
- Wiring issue.
Solutions:
- Replace hall sensor.
- Inspect wiring.
Adsitco Products: Hall sensors, wiring harnesses for electric seats.

B1213/B1214 – If Seat Memory Installed: Exterior Right Rearview Mirror Voltage Faulty

Description: Incorrect voltage for exterior right rearview mirror with seat memory.
Possible Causes:
- Faulty wiring.
- Defective mirror motor or control module.
Solutions:
- Inspect and repair wiring.
- Replace mirror motor or control module.
Adsitco Products: Rearview mirror motors, control modules.

B1226 to B1234 – Temperature Sensor Faults (In-Car, Outside, Heater Core, Evaporator, ECT, Refrigerant Pressure, Refrigerant Temperature, Sun Sensor)

Description: Faults detected in various temperature sensors affecting climate control and engine management.
Possible Causes:
- Faulty sensor.
- Wiring issue.
- Poor connection.
Solutions:
- Replace sensor.
- Inspect and repair wiring and connections.
Adsitco Products: Various temperature sensors, wiring harnesses.

B1235 – Emissions Sensor (B31)

Description: Fault detected in the emissions sensor.
Possible Causes:
- Faulty sensor.
- Wiring or connection issues.
Solutions:
- Replace emissions sensor.
- Inspect and repair wiring and connections.
Adsitco Products: Emissions sensors, wiring harnesses.

B1241 – Refrigerant Fill

Description: Issue related to refrigerant fill level in AC system.
Possible Causes:
- AC system leak.
- Incorrect refrigerant charge.
Solutions:
- Check for leaks.
- Recharge AC system.
Adsitco Products: AC leak detection kits, refrigerant.

B1246 – PTS Parktronic: Sensor or Cable Fault

Description: Fault in Parktronic system, sensor or cable fault in front bumper.
Possible Causes:
- Loose sensor connection.
- Faulty sensor or cable.
Solutions:
- Check sensor connection.
- Replace sensor or cable.
Adsitco Products: Parktronic sensors, wiring harnesses.

B1310 – Left/Window Airbag Sensor Defective

Description: Defective left/window airbag sensor.
Possible Causes:
- Defective sensor.
Solutions:
- Replace airbag sensor.
Adsitco Products: Airbag sensors.

B1315 – Front Passenger Child Seat Recognition Problem

Description: Problem with front passenger child seat recognition system.
Possible Causes:
- Faulty seat recognition sensor.
- Wiring issues.
Solutions:
- Replace seat recognition sensor.
- Inspect wiring.
Adsitco Products: Child seat recognition sensors, wiring harnesses.

B1416 to B1424 – Component Faults (Coolant Pump, Duovalves, Electromagnetic Clutch, Idle Speed Increase, Pulse Module, Series Interface, Switchover Valve Block, Charcoal Actuator)

Description: Faults in various body-related components affecting cooling, climate control, idle speed, and system interfaces.
Possible Causes:
- Faulty components.
- Electrical issues.
- Vacuum leaks.
- Software issues.
Solutions:
- Replace faulty components.
- Inspect and repair electrical connections and wiring.
- Check for vacuum leaks.
- Update software if applicable.
Adsitco Products: Coolant circulation pumps, duovalves, electromagnetic clutches, pulse modules, switchover valve blocks, activated charcoal filler actuators, wiring harnesses, diagnostic tools.

B1432 – Non-USA DTC

Description: Diagnostic Trouble Code specific to vehicles outside the USA.
Possible Causes:
- Varies by specific vehicle and region.
Solutions:
- Refer to region-specific documentation for troubleshooting.
Adsitco Products: General diagnostic tools and equipment.

B1459 – Series Interface (K2) Connection to Instrument Cluster (A1)

Description: Issue with series interface (K2) connection to instrument cluster.
Possible Causes:
- Damaged wiring or connectors.
- Faulty instrument cluster.
Solutions:
- Inspect and repair wiring and connectors.
- Replace instrument cluster.
Adsitco Products: Instrument cluster units, wiring repair kits.

B1462 – Wide Open Throttle (WOT) Position Signal Diesel Engines

Description: WOT position signal out of range in diesel engines.
Possible Causes:
- Faulty throttle position sensor.
- Wiring issues.
- ECM software update needed.
Solutions:
- Replace throttle position sensor.
- Inspect and repair wiring.
- Update ECM software.
Adsitco Products: Throttle position sensors, ECM diagnostic and programming tools.

B1476 – Airbag Malfunction Indicator and Warning Lamp Is Defective

Description: Defective airbag malfunction indicator lamp.
Possible Causes:
- Faulty MIL.
- Wiring or connection issues.
Solutions:
- Replace airbag MIL.
- Inspect and repair wiring and connections.
Adsitco Products: Airbag malfunction indicator lamps, wiring harnesses.

B1481/B1489 – HRA: Headlamp Range Adjustment Motor Faults

Description: Headlamp Range Adjustment (HRA) motor faults, including shorts.
Possible Causes:
- Faulty motor.
- Damaged wiring or connectors.
Solutions:
- Replace faulty motor.
- Inspect and repair wiring and connectors.
Adsitco Products: Headlamp range adjustment motors, wiring repair kits.

B1492 – HRA: Left Headlamp Range Adjustment Motor Short to Positive

Description: Left HRA motor short to positive.
Possible Causes:
- Faulty motor.
- Wiring or connector issues.
Solutions:
- Replace motor.
- Inspect and repair wiring.
Adsitco Products: Headlamp range adjustment motors, wiring harnesses.

B1617/B1618 – License Plate Lamp Defective

Description: Defective license plate lamp(s).
Possible Causes:
- Burnt-out bulb.
- Faulty wiring or connections.
Solutions:
- Replace bulb.
- Inspect and repair wiring and connections.
Adsitco Products: License plate lamps, wiring repair components.

B1628 – Turn Signal Lamp Defective in Module E2 (Right Front Headlamp Unit)

Description: Defective turn signal lamp in right front headlamp unit.
Possible Causes:
- Faulty lamp.
- Wiring issues.
- Headlamp unit problems.
Solutions:
- Replace turn signal lamp.
- Inspect headlamp unit and wiring.
Adsitco Products: Turn signal lamps, headlamp units, wiring harnesses.

B1703 – Intermittent No Start in AAM Immobiliser Module

Description: Intermittent no-start condition due to AAM immobilizer module.
Possible Causes:
- Faulty AAM module.
- Wiring issues.
- Key recognition problems.
Solutions:
- Diagnose and replace AAM module.
- Inspect wiring.
- Ensure keys are recognized.
Adsitco Products: AAM immobilizer modules, diagnostic tools.

B1729 – PSE Pneumatic System Doorlock Control Module A37

Description: Issue with PSE pneumatic system doorlock control module.
Possible Causes:
- Faulty module.
- Pneumatic system leaks.
- Electrical issues.
Solutions:
- Replace PSE module.
- Check for pneumatic leaks.
- Inspect and repair electrical connections.
Adsitco Products: PSE pneumatic system modules, leak detection kits, electrical repair kits.

B1736 – Navigation System’s CD Player Issues

Description: Problems with navigation system’s CD player.
Possible Causes:
- Faulty CD player.
- Damaged CDs.
Solutions:
- Repair or replace CD player.
- Use undamaged CDs.
Adsitco Products: Navigation system CD players, navigation CDs.

B1768 – Faulty Open Data Flap Limit Switch

Description: Open data flap limit switch is faulty.
Possible Causes:
- Faulty switch.
- Mechanical failure.
Solutions:
- Replace data flap limit switch.
Adsitco Products: Data flap limit switches.

B1773 – HRA: Zero Position Programming Issue

Description: Zero position programming issue for headlamp range adjustment.
Possible Causes:
- Programming error.
- Faulty HRA module.
Solutions:
- Perform zero position programming.
- Replace HRA module.
Adsitco Products: HRA modules, programming tools.

B1850 – Electric Seat Adjustment Front Right: CAN Communication Interrupted

Description: CAN communication interrupted with DCM for front right electric seat.
Possible Causes:
- Faulty DCM.
- Wiring or connector issues.
Solutions:
- Replace DCM.
- Inspect and repair wiring and connectors.
Adsitco Products: Door control modules, wiring repair kits.

C-Level Mercedes Fault Codes

C1010 – Battery Voltage Low

Description: Low battery voltage, affecting electrical systems.
Possible Causes:
- Weak or failing battery.
- Poor charging system.
- Electrical drains.
Solutions:
- Test and replace battery.
- Inspect charging system.
- Check for parasitic drains.
Adsitco Products: Replacement batteries, charging system components.

C1011 – ASR/ETS/ESP Circuit Open or Shorted

Description: Open or short circuit in ASR/ETS/ESP systems, affecting traction and stability control.
Possible Causes:
- Faulty wiring or connectors.
- Defective control modules.
Solutions:
- Inspect and repair wiring.
- Replace control modules.
Adsitco Products: Control modules for ASR, ETS, ESP systems, wiring repair components.

C1012 – Battery Voltage High

Description: High battery voltage, potentially damaging electrical components.
Possible Causes:
- Faulty alternator or voltage regulator.
- Electrical system faults.
Solutions:
- Check and replace alternator or voltage regulator.
- Inspect electrical system.
Adsitco Products: Alternators, voltage regulators.

C1020 to C1025 – CAN Communication Faults (General, EA/CC/ISC, Engine Control Module, BAS-ESP)

Description: Various CAN communication faults affecting different control modules.
Possible Causes:
- Faulty ECU.
- Damaged wiring or connectors.
- CAN bus faults.
- Defective control modules.
Solutions:
- Diagnose and repair CAN bus system.
- Replace faulty ECU or wiring.
- Replace control modules.
Adsitco Products: ECUs, wiring harnesses, CAN bus diagnostic tools, various control modules.

C1100 to C1103 – VSS Circuit Faults (Left Front, Right Front, ETS/ASR/ABS Left, Right Rear Axle)

Description: Vehicle Speed Sensor (VSS) circuit faults on various axles, affecting speedometer and ABS.
Possible Causes:
- Faulty VSS.
- Damaged wiring or connectors.
Solutions:
- Replace VSS.
- Inspect and repair wiring.
Adsitco Products: Vehicle speed sensors, wiring harnesses.

C1121 to C1135 – AIRmatic Level Sensor Faults (B22/3, B22/4, B22/6, B22/8, B22/9)

Description: Faults in various AIRmatic system level sensors, affecting vehicle stability and ride comfort.
Possible Causes:
- Faulty level sensor.
- Wiring issues.
- Air suspension problems.
Solutions:
- Replace level sensor.
- Check wiring and air suspension components.
Adsitco Products: AIRmatic level sensors, air suspension components, wiring repair kits.

C1140, C1142, C1144 – BAS Light/Steering Angle Sensor/ABS Lateral Acceleration Sensor/AIRmatic Pressure Sensor Faults

Description: Faults related to BAS system, steering angle sensor, ABS lateral acceleration sensor, and AIRmatic pressure sensor.
Possible Causes:
- Loose steering column.
- Faulty steering angle sensor.
- Faulty lateral acceleration sensor.
- Defective pressure sensor.
- Wiring issues.
Solutions:
- Secure steering column.
- Replace sensors.
- Inspect and repair wiring.
- Check for air leaks.
Adsitco Products: Steering angle sensors, steering column repair kits, ABS sensors, AIRmatic pressure sensors, wiring repair kits, leak detection tools.

C1200 – Stop Light Switch Open/Shorted/Implausible

Description: Fault in stop light switch circuit, affecting brake light functionality.
Possible Causes:
- Faulty stop light switch.
- Wiring issues.
Solutions:
- Replace stop light switch.
- Inspect and repair wiring.
Adsitco Products: Stop light switches, electrical wiring kits.

C1300 to C1312 – Solenoid Valve Faults (Axle Hold, Release, Master Cylinder Switchover)

Description: Faults in solenoid valves affecting suspension and braking performance.
Possible Causes:
- Defective solenoid valves.
- Wiring or connection faults.
- Hydraulic system issues.
Solutions:
- Replace faulty solenoid valves.
- Ensure wiring integrity.
- Inspect brake hydraulic system.
Adsitco Products: Solenoid valves for suspension systems, wiring repair kits, master cylinder switchover valves, brake system repair kits.

C1401 – High Pressure Return Pump Circuit Open/Shorted; Will Not Shut Off

Description: High-pressure return pump circuit issue, pump may not shut off.
Possible Causes:
- Faulty pump.
- Electrical circuit issues.
Solutions:
- Replace high-pressure return pump.
- Repair electrical faults.
Adsitco Products: High-pressure pumps, electrical repair components.

C1501, C1504, C1512, C1600 – SPS P-Valve, BAS Light/Steering Angle Sensor Repeat, Brakes Overheated, Temperature After Engine Off

Description: Various chassis-related faults including SPS valve, BAS/Steering Angle Sensor repeat, brakes overheated, and high temperature after engine off.
Possible Causes:
- Faulty SPS valve.
- Loose steering column.
- Excessive braking.
- Cooling system malfunction.
- Sensor faults.
Solutions:
- Replace SPS P-Valve.
- Secure steering column.
- Check and replace brake components.
- Inspect and repair cooling system.
- Replace sensors.
Adsitco Products: SPS valves, steering system components, BAS system parts, brake pads, rotors, cooling system parts, temperature sensors.

U0 Mercedes Trouble Codes

U0002 to U0027 – CAN Communication Bus Faults (High, Medium, Low Speed)

Description: Various faults related to High, Medium, and Low Speed CAN communication buses, including performance, open circuits, shorts, and signal issues.
Possible Causes:
- Faulty wiring or connectors.
- Defective CAN bus controller or modules.
- Short circuits to ground or voltage.
- Open circuits.
- Network congestion.
Solutions:
- Inspect and repair CAN bus wiring and connectors.
- Replace CAN bus controllers or modules.
- Repair short or open circuits.
- Diagnose and clear network congestion.
Adsitco Products: CAN bus controllers, wiring repair kits, connector repair kits, electrical diagnostic tools, network communication diagnostic tools, shielded wiring, ground fault detection tools, voltage testers, CAN bus compatible modules, high-quality wiring and connector repair components, automotive wiring kits, secure-fit connectors, short circuit locators, replacement network components for low-speed systems, high-quality control modules.

U0028 to U0072 – Vehicle Communication Bus A to E and Their Conditions

Description: Faults in Vehicle Communication Buses A to E, encompassing performance, open circuits, shorts, and signal issues.
Possible Causes:
- Varied by code, generally wiring faults, short circuits, open circuits, and bus performance issues.
Solutions:
- Diagnose specific bus affected.
- Repair or replace wiring.
- Resolve short or open circuit issues.
- Replace defective modules.
Adsitco Products: Diagnostic tools for vehicle communication systems, wiring repair kits, OEM-quality replacement modules.

U0073 – Control Module Communications Bus Off

Description: Control module communication bus is offline.
Possible Causes:
- Faulty control module.
- Major network disruption.
Solutions:
- Diagnose and replace faulty control modules.
- Repair network disruptions.
Adsitco Products: Control modules, network diagnostics and repair tools.

U0100 to U0105 – Lost Communication with Critical Control Modules (ECM/PCM, TCM, Transfer Case, Gear Shift, Cruise Control, Fuel Injector)

Description: Lost communication with critical control modules affecting engine, transmission, and driving systems.
Possible Causes:
- Faulty modules.
- Disrupted CAN communication.
- Wiring issues.
Solutions:
- Check for CAN communication faults.
- Replace faulty modules.
- Repair wiring.
Adsitco Products: ECM/PCM, TCM, and other control modules, CAN communication repair tools, wiring harnesses.

U0192 to U0198 – Lost Communication with Entertainment and Communication Modules (Television, Telephone, Telematic)

Description: Communication issues with entertainment, telephone, and telematics systems.
Possible Causes:
- Disconnected modules.
- CAN bus issues.
- Wiring faults.
Solutions:
- Reconnect or replace modules.
- Diagnose CAN bus.
- Repair wiring.
Adsitco Products: Entertainment and communication modules, diagnostic tools for entertainment systems, wiring repair components.

U0222, U0235 – Lost Communication with Specific Components (Door Window Motor A, Cruise Control Front Distance Range Sensor)

Description: Communication problems with door window motors and cruise control sensors.
Possible Causes:
- Faulty components.
- Wiring or CAN bus issues.
Solutions:
- Replace faulty components.
- Diagnose and repair CAN bus and wiring issues.
Adsitco Products: Replacement door window motors, cruise control sensors, CAN bus diagnostics.

U0301 to U0327 – Software Incompatibility Issues with Control Modules (ECM/PCM, TCM, Transfer Case, Ride Level, Immobilizer, Security)

Description: Software incompatibility between control units, affecting performance and functionality.
Possible Causes:
- Outdated software.
- Incorrect module programming.
Solutions:
- Update module software.
- Reprogram modules.
Adsitco Products: Module programming tools, software update services.

U0038 – Vehicle Communication Bus B Performance

Description: Performance issue with Vehicle Communication Bus B.
Possible Causes:
- Network congestion.
- Damaged bus wiring or connectors.
- Faulty control modules.
Solutions:
- Diagnose and clear network congestion.
- Repair or replace damaged bus wiring or connectors.
- Replace faulty control modules.
Adsitco Products: Network diagnostic scanners, high-quality wiring and connector repair kits, OEM-standard control modules.

Advanced Troubleshooting Tips

When your Mercedes-Benz displays a warning light, an OBD-II scanner is your first line of defense. These tools provide real-time data and trouble codes that are essential for accurate diagnostics. However, to maximize their effectiveness:

Scanner Compatibility: Ensure your OBD-II scanner is compatible with Mercedes-Benz vehicles. Some generic scanners may not fully interpret Mercedes-specific codes or access all systems. Mercedes-Benz specific scanners or professional-grade scan tools often provide more detailed and accurate diagnostics.
Software Updates: Keep your scanner’s software updated. Newer vehicles and updated diagnostic protocols require up-to-date software for accurate readings and interpretations.
Understanding Live Data: Beyond reading codes, learn to use your scanner to view live data streams. This real-time information from sensors can help pinpoint intermittent issues or monitor system performance under various conditions.
Professional Diagnostics: For complex or persistent issues, professional diagnostics with specialized equipment may be necessary. Mercedes-Benz dealerships and specialized repair shops have access to advanced diagnostic tools and technical expertise for intricate system analysis.

Alt text: An OBD2 scanner connected to the OBD-II port of a Mercedes-Benz, illustrating the process of retrieving diagnostic trouble codes.

Adsitco’s Role in Your Mercedes-Benz Maintenance

Adsitco is committed to supporting the maintenance and longevity of your Mercedes-Benz. Our extensive inventory includes a wide range of parts specifically designed for Mercedes-Benz vehicles, ensuring you have access to quality components to address any OBD-II code related issue.

From sensors and control modules to engine and transmission parts, Adsitco provides parts that meet or exceed OEM standards. Our product range directly addresses many of the common causes behind OBD-II codes, helping you to perform effective repairs and maintenance. By choosing Adsitco, you are ensuring that your Mercedes-Benz receives the precise parts it needs to restore and maintain its performance and reliability.

Conclusion

Understanding Mercedes-Benz OBD-II codes is a vital skill for every Mercedes-Benz owner and technician. This knowledge empowers you to effectively diagnose and address vehicle issues, from simple sensor replacements to more complex system malfunctions. By using this guide in conjunction with a reliable OBD-II scanner and quality parts from Adsitco, you can ensure your Mercedes-Benz remains in optimal condition, delivering the luxury and performance you expect.

Explore Adsitco’s extensive catalog of Mercedes-Benz parts to find the components you need to resolve your OBD-II code issues and maintain your vehicle’s excellence.

Frequently Asked Questions (FAQ) About Mercedes-Benz OBD-II Codes

1. Can I clear a Mercedes-Benz OBD-II code without a scanner?

Yes, for minor, non-critical codes, you can attempt a manual reset:

Battery Disconnect: Disconnect the negative terminal of your car battery for 15-20 minutes. This can reset the ECU and clear temporary codes.
Gas Cap Check: Ensure your gas cap is tightly closed. A loose gas cap is a common cause for EVAP system codes.
Drive Cycles: After addressing the potential issue, drive your vehicle through several normal drive cycles (start, drive, stop, turn off). Some codes will clear automatically if the problem is resolved and does not recur.

However, for persistent codes or more serious issues, using an OBD-II scanner to properly diagnose and clear codes is highly recommended.

2. What does a flashing check engine light mean on a Mercedes?

A flashing check engine light on a Mercedes-Benz is a serious warning, typically indicating severe engine misfires. This can lead to significant damage to the catalytic converter and other engine components.

Immediate Action Required:
- Reduce Speed: Drive at a reduced speed and avoid heavy acceleration.
- Stop Driving (If Safe): If the flashing light is accompanied by rough engine running or loss of power, safely pull over and stop driving.
- Professional Inspection: Get your vehicle inspected by a qualified mechanic or Mercedes-Benz service center immediately to diagnose and repair the issue.

3. What OBD-II scanner works best for Mercedes-Benz vehicles?

For Mercedes-Benz vehicles, while generic OBD-II scanners can read basic codes, specialized scanners offer enhanced diagnostics and functionality. Recommended options include:

Professional Level:
- Mercedes-Benz Star Diagnostic (XENTRY/DAS): The tool used by Mercedes-Benz dealerships, offering the most comprehensive diagnostics, coding, and programming capabilities.
Advanced DIY/Enthusiast Level:
- iCarsoft MB V3.0 or newer: A popular choice for Mercedes-Benz owners, providing advanced diagnostics, service resets, and bi-directional control features at a more accessible price point.
- Autel MaxiCOM series: Offers extensive vehicle coverage including Mercedes-Benz, with advanced diagnostic and service functions.
Entry-Level/Basic Diagnostics:
- BlueDriver Bluetooth Scanner: A user-friendly option that pairs with a smartphone app, suitable for reading and clearing codes, and viewing live data.

Choose a scanner based on your diagnostic needs and budget. For in-depth diagnostics and service functions specific to Mercedes-Benz, a Mercedes-Benz specific scanner or an advanced multi-brand scanner is advisable.

4. Can an OBD-II code cause my Mercedes to go into “limp mode”?

Yes, certain OBD-II codes, particularly those related to the transmission (e.g., P0700, P0730, P0740 series) or critical engine management systems, can trigger “limp mode,” also known as “safe mode” or “reduced power mode.” This is a safety feature designed to limit vehicle speed and engine power to prevent further damage.

If your Mercedes enters limp mode:
1. Safety First: If safe, pull over to a safe location and stop the vehicle.
2. Restart Vehicle: Turn off the ignition, wait a few minutes, and restart the engine. Sometimes, this may temporarily resolve the issue, but it’s crucial to still investigate the underlying cause.
3. OBD-II Scan: Use an OBD-II scanner to check for stored trouble codes to understand why limp mode was activated.
4. Professional Service: If limp mode persists or if you are unsure about the diagnosis, seek professional service from a qualified mechanic or Mercedes-Benz specialist. Driving in limp mode for extended periods is not recommended and may lead to further complications.

5. Do I need to reset the ECU after fixing an issue indicated by an OBD-II code?

Generally, for many OBD-II codes, especially emission-related ones, the ECU (Engine Control Unit) will automatically clear the code after the fault condition is resolved and after a certain number of drive cycles without the fault reoccurring.

Automatic Clearing: If the issue is fully fixed, the check engine light may turn off on its own after a few drive cycles.
Manual Reset (Optional): While not always necessary, you can manually clear codes using an OBD-II scanner after repair to immediately turn off the check engine light and to confirm that the repair was effective.
Post-Reset Scan: Even after clearing codes, it’s advisable to perform another scan after a few days of driving to check if any codes have returned or if there are any pending codes that might indicate unresolved or new issues.

For Mercedes-Benz models, especially for more complex issues, clearing codes should be part of a thorough diagnostic and repair process. Always ensure the root cause of the code is properly addressed, not just clearing the code itself.

Latest Updates for 2025

To maintain this guide as a current and valuable resource for understanding Mercedes-Benz OBD-II codes, the following updates are incorporated for 2025:

Expanded Code Coverage: The OBD-II code list has been expanded and reviewed to include more codes relevant to newer Mercedes-Benz models, up to and including 2024 releases, ensuring broader coverage of potential diagnostic scenarios.
Refined Troubleshooting Information: Solutions and troubleshooting steps for common codes have been updated based on the latest automotive service trends and repair data, providing more effective and current repair advice.
Recommended Diagnostic Tools Update: The list of recommended scan tools now includes newer models like the iCarsoft MB V3.0 and the latest Mercedes-Benz Star Diagnostic Tool software versions, reflecting advancements in diagnostic technology.
Enhanced User Guidance: More detailed user tips and best practices have been added to help Mercedes-Benz owners differentiate between minor OBD-II code issues that may be DIY-resolvable and situations requiring professional intervention, promoting informed decision-making regarding vehicle maintenance.

Mercedes-Benz continues to advance its vehicle diagnostic systems. Staying informed about OBD-II codes, utilizing high-quality diagnostic scanners, and adhering to regular maintenance schedules are key to keeping your Mercedes-Benz performing optimally. Check back for future updates and rely on Adsitco for the latest Mercedes-Benz parts and accessories.

Additional Resources

For more in-depth information on Mercedes-Benz diagnostics and maintenance, explore our Manuals category at Adsitco. Here, you can find a variety of resources including owner’s manuals, engine service manuals, and other helpful documentation to assist you in understanding and maintaining your Mercedes-Benz vehicle. Trust Adsitco for all your Mercedes-Benz parts needs, and experience the advantage of quality parts and expert knowledge in your vehicle maintenance efforts.