Decoding Your GM Vehicle: A Comprehensive OBD2 Trouble Codes List

Navigating car trouble can be frustrating, but understanding your GM vehicle’s OBD2 system is the first step to a solution. This guide provides an extensive Gm Obd2 Codes List, specifically for General Motors vehicles manufactured from 1996 onwards. This includes a wide range of brands like GMC, Chevrolet, Buick, Cadillac, and even older brands such as Oldsmobile, Pontiac, and Saturn.

While this list is broadly applicable, remember that slight variations can exist depending on your specific vehicle’s year and model. Always consult your vehicle’s factory service manual for the most precise information.

GM vehicles primarily utilize the SAE J1850 VPW (Variable Pulse Width Modulation) communication protocol. However, it’s worth noting some exceptions, like the Cadillac Catera (a German Opel derivative), which uses the European ISO 9141 protocol. For the vast majority of GM vehicles in the US market, this list will be highly relevant.

Understanding GM Specific OBD2 Powertrain Diagnostic Trouble Codes

This section focuses on GM specific powertrain diagnostic trouble codes. These codes are crucial for diagnosing issues related to your engine and transmission. They go beyond the generic OBD2 codes (P0XXX) and provide more detailed insights into potential problems within your GM vehicle.

[It’s beneficial to understand how to use an OBD2 scanner to retrieve these codes. This list becomes most valuable when you have a code in hand and need to decipher its meaning.]

Below is a detailed GM OBD2 codes list, starting with P1XXX codes, offering descriptions to help you understand potential issues.

DTC Description
P1031 HO2S Heater Current Monitor Control Circuit Banks 1 and 2 Sensor 1
P1032 HO2S Heater Warm Up Control Circuit Banks 1 and 2 Sensor 1
P1105 Secondary Vacuum Sensor Circuit
P1106 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage
P1107 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage
P1108 BARO to MAP Sensor Comparison Too High
P1109 Secondary Port Throttle System
P1111 Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage
P1112 Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage
P1113 Intake Resonance Switchover Solenoid Control Circuit
P1114 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage
P1115 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage
P1116 ECT Signal Unstable or Intermittent
P1117 Engine Coolant Temp. Signal Out-Of-Range Low
P1118 Engine Coolant Temp. Signal Out-Of-Range High
P1119 ECT Signal Out-Of-Range With TFT Sensor
P1120 Throttle Position (TP) Sensor 1 Circuit
P1121 Throttle Position (TP) Sensor Circuit Intermittent High Voltage
P1122 Throttle Position (TP) Sensor Circuit Intermittent Low Voltage
P1125 APP System
P1130 HO2S Circuit Low Variance Bank 1 Sensor 1
P1131 HO2S Circuit Low Variance Bank 1 Sensor 2
P1132 HO2S Circuit Low Variance Bank 2 Sensor 1
P1133 HO2S Insufficient Switching Bank 1 Sensor 1
P1134 HO2S Transition Time Ratio Bank 1 Sensor 1
P1135 HO2S Lean Mean Bank 1 Sensor 1
P1136 HO2S Rich Mean Bank 1 Sensor 1
P1137 HO2S Bank 1 Sensor 2 Lean System or Low Voltage
P1138 HO2S Bank 1 Sensor 2 Rich or High Voltage
P1139 HO2S Insuff. Switching Bank 1 Sensor 2
P1140 HO2S Transition Time Ratio Bank 1 Sensor 2
P1141 HO2S Heater Control Circuit Bank 1 Sensor 2
P1143 HO2S Bank 1 Sensor 3 Lean System or Low Voltage
P1144 HO2S Bank 1 Sensor 3 Rich or High Voltage
P1145 HO2S Cross Counts Bank 1 Sensor 3
P1153 HO2S Insufficient Switching Bank 2 Sensor 1
P1154 HO2S Transition Time Ratio Bank 2 Sensor 1
P1155 HO2S Lean Mean Bank 2 Sensor 1
P1156 HO2S Rich Mean Bank 2 Sensor 1
P1157 HO2S Bank 2 Sensor 2 Lean System or Low Voltage
P1158 HO2S Bank 2 Sensor 2 Rich or High Voltage
P1159 HO2S Cross Counts Bank 2 Sensor 2
P1161 HO2S Heater Control Circuit Bank 2 Sensor 2
P1163 HO2S Bank 2 Sensor 3 Lean System or Low Voltage
P1164 HO2S Bank 2 Sensor 3 Rich or High Voltage
P1165 HO2S Cross Counts Bank 2 Sensor 3
P1170 Bank to Bank Fuel TrimOffset
P1171 Fuel System Lean During Acceleration
P1185 Engine Oil Temperature Circuit
P1186 EOT Circuit Performance
P1187 EOT Sensor Ckt. Low Voltage
P1188 EOT Sensor Ckt. High Voltage
P1189 Engine Oil Pressure (EOP) Switch Circuit
P1190 Engine Vacuum Leak
P1191 Intake Air Duct Air Leak
P1200 Injector Control Circuit
P1201 (Alt. Fuel) Gas Mass Sensor Circuit Range/Performance
P1202 (Alt. Fuel) Gas Mass Sensor Circuit Low Frequency
P1203 (Alt. Fuel) Gas Mass Sensor Circuit High Frequency
P1211 Mass Air Flow Circuit Intermittent High
P1212 Mass Air Flow Circuit Intermittent Low
P1214 Injection Pump Timing Offset
P1215 Ground Fault Detection Indicated
P1216 Fuel Solenoid Response Time Too Short
P1217 Fuel Solenoid Response Time Too Long
P1218 Injection Pump Calibration Circuit
P1219 Throttle Position Sensor Reference Voltage
P1220 Throttle Position (TP) Sensor 2 Circuit
P1221 Fuel Pump Secondary Circuit Low
P1222 Injector Control Circuit Intermittent
P1225 Injector Circuit Cylinder 2 Intermittent
P1228 Injector Circuit Cylinder 3 Intermittent
P1231 Injector Circuit Cylinder 4 Intermittent
P1234 Injector Circuit Cylinder 5 Intermittent
P1237 Injector Circuit Cylinder 6 Intermittent
P1240 Injector Circuit Cylinder 7 Intermittent
P1243 Injector Circuit Cylinder 8 Intermittent
P1245 Intake Plenum Switchover Valve
P1250 Early Fuel Evaporation Heater Circuit
P1257 Supercharger System Overboost
P1258 Engine Coolant Overtemperature – Protection Mode Active
P1260 Last Test Failed Failed SCC ENTER:More Info.
P1270 Accelerator Pedal Position Sensor A/D Converter Error
P1271 Accelerator Pedal Position (APP) Sensor 1-2 Correlation
P1272 Accelerator Pedal Position Sensor 2
P1273 “Accelerator Pedal Position Sensor 1
P1274 Injectors Wired Incorrectly
P1275 Accelerator Pedal Position (APP) Sensor 1 Circuit
P1276 Accelerator Pedal Position Sensor 1 Circuit Performance
P1277 Accelerator Pedal Position Sensor 1 Circuit Low Voltage
P1278 Accelerator Pedal Position Sensor 1 Circuit High Voltage
P1280 Accelerator Pedal Position (APP) Sensor 2 Circuit
P1281 Accelerator Pedal Position Sensor 2 Circuit Performance
P1282 Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P1283 Accelerator Pedal Position Sensor 2 Circuit High Voltage
P1285 Accelerator Pedal Position Sensor 3 Circuit
P1286 Accelerator Pedal Position Sensor 3 Circuit Performance
P1287 Accelerator Pedal Position Sensor 3 Circuit Low Voltage
P1288 Accelerator Pedal Position Sensor 3 Circuit High Voltage
P1300 Ignitor Circuit DTC
P1305 Ignition Coil 2 Primary Feedback Circuit
P1310 Ignition Coil 3 Primary Feedback Circuit
P1315 Ignition Coil 4 Primary Feedback Circuit
P1320 IC 4X Reference Circuit Intermittent
P1321 Electronic Ignition System Fault Line
P1322 EI System or Ignition Control Extra or Missing
P1323 IC 24X Reference Circuit Low Frequency
P1324 Crank RPM Too Low
P1335 CKP Circuit
P1336 Crankshaft Position (CKP) System Variation Not Learned
P1345 Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation
P1346 Intake Camshaft Position [CMP] Sensor System Performance
P1350 Ignition Control System
P1351 Ignition Coil Control Circuit High Voltage
P1352 IC Output High/Pulse Detected when GND_Cyl. 2
P1353 IC Output High/Pulse Detected when GND_Cyl. 3
P1354 IC Output High/Pulse Detected when GND_Cyl. 4
P1355 IC Output High/Pulse Detected when GND_Cyl. 5
P1356 IC Output High/Pulse Detected when GND_Cyl. 6
P1357 IC Output High/Pulse Detected when GND_Cyl. 7
P1358 IC Output High/Pulse Detected when GND_Cyl. 8
P1359 Ignition Coil Group 1 Control Circuit
P1360 Ignition Coil Group 2 Control Circuit
P1361 Ignition Coil Control Circuit Low Voltage
P1362 IC Cylinder 2 Not Toggling After Enable
P1363 IC Cylinder 3 Not Toggling After Enable
P1364 IC Cylinder 4 Not Toggling After Enable
P1365 IC Cylinder 5 Not Toggling After Enable
P1366 IC Cylinder 6 Not Toggling After Enable
P1367 IC Cylinder 7 Not Toggling After Enable
P1368 IC Cylinder 8 Not Toggling After Enable
P1370 IC 4X Reference Circuit Too Many Pulses
P1371 IC 4X Reference Circuit Too Few Pulses
P1372 Crankshaft Position (CKP) Sensor A-B Correlation
P1374 3X Reference Circuit
P1375 IC 24X Reference Circuit High Voltage
P1376 Ignition Ground Circuit
P1377 IC Cam Pulse To 4X Reference Pulse
P1380 Misfire Detected – Rough Road Data Not Available
P1381 Misfire Detected – No Communication with Brake Control ModuleP1390
P1390 Wheel Speed Sensor 1 – G – Sensor Circuit
P1391 Wheel Speed Sensor 1 – G – Sensor Circuit Performance
P1392 Wheel Speed Sensor 1 – G – Sensor Circuit Low Voltage
P1393 Wheel Speed Sensor 1 – G – Sensor Circuit High Voltage
P1394 Wheel Speed Sensor 1 – G – Sensor Circuit Intermittent
P1395 Wheel Speed Sensor 2 – G – Sensor Circuit
P1396 Wheel Speed Sensor 2 – G – Sensor Circuit Performance
P1397 Wheel Speed Sensor 2 – G – Sensor Circuit Low Voltage
P1398 Wheel Speed Sensor 2 – G – Sensor Circuit High Voltage
P1399 Wheel Speed Sensor 2 – G – Sensor Circuit Intermittent
P1403 Exhaust Gas Recirculation System Valve 1
P1404 Exhaust Gas Recirculation (EGR) Closed Position PerformanceP1405
P1405 Exhaust Gas Recirculation System Valve 3
P1406 EGR Valve Pintle Position Circuit
P1407 EGR Air Intrusion in Exhaust Supply to EGR Valve
P1408 Intake Manifold Pressure Sensor Circuit
P1409 EGR Vacuum System Leak
P1410 Fuel Tank Pressure System
P1415 Secondary Air Injection (AIR) System Bank 1
P1416 Secondary Air Injection (AIR) System Bank 2
P1418 Secondary Air Injection System Relay A Control Circuit HighP1420
P1420 Intake Air Low Pressure Switch Circuit Low Voltage
P1421 Intake Air Low Pressure Switch Circuit High Voltage
P1423 Intake Air High Pressure Switch Circuit High Voltage
P1431 Fuel Level Sensor 2 Circuit Performance
P1432 Fuel Level Sensor 2 Circuit Low Voltage
P1433 Fuel Level Sensor 2 Circuit High Voltage
P1441 Evaporative Emission (EVAP) System Flow During Non-Purge
P1442 EVAP Vacuum Sw. High Voltage During Ign. On
P1450 Barometric Pressure Sensor Circuit
P1451 Barometric Press. Sensor Performance
P1460 Cooling Fan Control System
P1460 Misfire Detected With Low Fuel Level
P1480 Cooling Fan 1 Control Circuit High
P1483 Engine Cooling System Performance
P1500 Starter Signal Circuit
P1501 Theft Deterrent System
P1501 Vehicle Speed Sensor Circuit Intermittent
P1502 Theft Deterrent Fuel Enable Signal Not Received
P1503 Theft Deterrent Fuel Enable Signal Not Correct
P1504 Vehicle Speed Output Circuit
P1508 Idle Speed Low – Idle Air Control (IAC) System Not RespondingP1509
P1509 Idle Speed High – Idle Air Control (IAC) System Not RespondingP1510
P1510 Throttle Control System Performance – Throttle Limitation ActiveP1511
P1511 Throttle Control System – Backup System Performance
P1514 Airflow to TP Sensor Correlation High
P1515 Electronic Throttle System Throttle Position
P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position PerformanceP1517
P1517 Electronic Throttle Module
P1518 Electronic Throttle Module to PCM Communication
P1519 Throttle Actuator Control (TAC) Module Internal Circuit
P1520 Transmission Range Switch Circuit
P1521 Transmission Engaged at High Throttle Angle
P1522 Park/Neutral to Drive/Reverse at High RPM
P1523 Throttle Closed Position Performance
P1524 Throttle Closed Position Performance
P1525 Throttle Body ServiceRequired
P1526 Minimum Throttle Position Not Learned
P1527 Transmission Range to Pressure Switch Correlation
P1528 GovernorP1529
P1529 Heated Windshield Request Problem
P1530 Throttle Actuator Control (TAC) Module Internal Circuit
P1531 A/C Low Side Temperature Sensor Fault
P1532 A/C Evaporator Temp. Sens. Ckt. Low Voltage
P1533 A/C Evaporator Temp. Sens. Ckt. High Voltage
P1534 A/C High Side Temp. Sensor Low Voltage
P1535 A/C High Side Temperature Sensor Circuit
P1536 Engine Coolant Overtemperature – Air Conditioning (A/C) DisabledP1537
P1537 A/C Request Circuit Low Voltage
P1538 A/C Request Circuit High Voltage
P1539 A/C Clutch Status Circuit High Voltage
P1540 Air Conditioning (A/C) Refrigerant Overpressure – Air Conditioning (A/C) DisabledP1541
P1541 A/C High Side Over Temperature
P1542 A/C System High Pressure High Temperature
P1543 A/C System Performance
P1544 A/C Refrigerant Condition Very Low
P1545 Air Conditioning (A/C) Clutch Relay Control Circuit
P1546 A/C Clutch Status Circuit Low Voltage
P1547 A/C System Performance Degraded
P1548 A/C Recirculation Circuit
P1554 Cruise Control Feedback Circuit
P1555 Electronic Variable Orifice Output
P1558 Cruise Control Servo Indicates Low
P1559 Cruise Control Power Management Mode
P1560 Transaxle Not in Drive – Cruise Control Disabled
P1561 Cruise Vent Solenoid
P1562 Cruise Vacuum Solenoid
P1563 Cruise Vehicle Speed/Set Speed Difference Too High
P1564 Vehicle Acceleration Too High – Cruise Control Disabled
P1565 Cruise Servo Position Sensor
P1566 Engine RPM Too High – Cruise Control Disabled
P1567 Active Banking Control Active – Cruise Control Disabled
P1568 Cruise Servo Stroke Greater than Commanded in Cruise
P1569 Cruise Servo Stroke High While not in Cruise
P1570 Traction Control Active – Cruise Control Disabled
P1571 Traction Control Torque Request Circuit
P1572 ASR Active Circuit Low Too Long
P1573 PCM/EBTCM Serial Data Circuit
P1574 Stoplamp Switch Circuit
P1575 Extended Travel Brake Switch Circuit
P1576 BBV Sensor Ckt. High Voltage
P1577 BBV Sensor Ckt. Low Voltage
P1578 BBV Sensor Ckt. Low Vacuum
P1579 P/N to D/R at High Throttle Angle – Power Reduction Mode ActiveP1580
P1580 Cruise Move Circuit Low Voltage
P1581 Cruise Move Circuit High Voltage
P1582 Cruise Direction Circuit Low Voltage
P1583 Cruise Direction CircuitHigh Voltage
P1584 Cruise Control Disabled
P1585 Cruise Control Inhibit Output Circuit
P1586 Cruise Control Brake Switch 2 Circuit
P1587 Cruise Control Clutch Control Circuit Low
P1588 Cruise Control Clutch Control Circuit High
P1599 Engine Stall or Near Stall Detected
P1600 TCM Internal Watchdog Operation
P1601 Serial Comm. Problem With Device 1
P1602 Knock Sensor (KS) Module Performance
P1603 Loss of SDM Serial Data
P1604 Loss of IPC Serial Data
P1605 Loss of HVAC Serial Data
P1606 Serial Communication Problem With Device 6
P1607 Serial Communication Problem With Device 7
P1608 Serial Communication Problem With Device 8
P1609 Loss Of TCS Serial Data
P1610 Loss of PZM Serial Data
P1611 Loss of CVRTD Serial Data
P1612 Loss of IPM Serial Data
P1613 Loss of DIM Serial Data
P1614 Loss of RIM Serial Data
P1615 Loss of VTD Serial Data
P1617 Engine Oil Level Switch Circuit
P1619 Engine Oil Life Monitor Reset Circuit
P1620 Low Coolant Circuit
P1621 Control Module Long Term Memory Performance
P1622 Cylinder SelectP1623
P1623 Transmission Temp Pull-Up Resistor
P1624 Customer Snapshot Requested – Data Available
P1625 TCM System Reset
P1626 Theft Deterrent Fuel Enable Signal Not Received
P1627 A/D PerformanceP1628
P1628 ECT Pull-Up Resistor
P1629 Theft Deterrent System – Cranking Signal
P1630 Theft Deterrent Learn Mode Active
P1631 Theft Deterrent Start Enable Signal Not Correct
P1632 Theft Deterrent Fuel Disable Signal Received
P1633 Ignition 0 Switch Circuit
P1634 Ignition 1 Switch Circuit
P1635 5 Volt Reference Circuit
P1636 PCM Stack Overrun
P1637 Generator L-Terminal Circuit
P1638 Generator F-Terminal Circuit
P1639 5 Volt Reference 2 Circuit
P1640 Driver-1-Input High Voltage
P1641 Malfunction Indicator Lamp (MIL) Control Circuit
P1642 Vehicle Speed Output Circuit
P1643 Engine Speed Output Circuit
P1644 Traction Control Delivered Torque Output Circuit
P1645 Evaporative Emission (EVAP) Vent Solenoid Contorl Circuit
P1646 Evaporative Emission (EVAP) Vent Solenoid Control Circuit
P1647 Driver 1 Line 7P1650
P1650 Control Module Output B Circuit
P1651 Fan 1 Relay Control Circuit
P1652 Powertrain Induced Chassis Pitch Output Circuit
P1653 Oil Level Lamp Control Circuit
P1654 Cruise Control Inhibit Output Circuit
P1655 EVAP Purge Solenoid Control Circuit
P1656 Driver 2 Line 6P1657
P1657 1-4 Upshift Solenoid Control Circuit
P1658 Starter Enable Relay Control Circuit
P1660 Cooling Fan Control Circuits
P1661 MIL Control Circuit
P1662 Cruise Lamp Control Circuit
P1663 Oil Life Lamp Control Circuit
P1664 1-4 Upshift Lamp Control Circuit
P1665 Driver 3 Line 5P1666
P1666 Driver 3 Line 6P1667
P1667 Reverse Inhibit Solenoid Control Circuit
P1669 ABS Unit Expected
P1670 Driver 4P1671
P1671 Driver 4 Line 1P1672
P1672 Low Engine Oil Level Lamp Control Circuit
P1673 Engine Hot Lamp Control Circuit
P1674 Tachometer Control Circuit
P1675 EVAP Vent Solenoid Control Circuit
P1676 Driver 4 Line 6P1677
P1677 Driver 4 Line 7P1680
P1680 Driver 5P1681
P1681 Driver 5 Line 1P1682
P1682 Driver 5 Line 2P1683
P1683 Driver 5 Line 3P1684
P1684 Driver 5 Line 4P1685
P1685 Driver 5 Line 5P1686
P1686 Driver 5 Line 6P1687
P1687 Driver 5 Line 7P1689
P1689 Delivered Torque Circuit Fault
P1690 ECM Loop Overrun
P1691 Coolant Gage Circuit Low Voltage
P1692 Coolant Gage Circuit High Voltage
P1693 Tachometer Circuit Low Voltage
P1694 Tachometer Circuit High Voltage
P1695 Remote Keyless Entry Circuit Low
P1696 Remote Keyless Entry Voltage High
P1700 Transmission Control Module (TCM) Requested MIL IlluminationP1701
P1701 Trans. MIL Request Circuit
P1705 P/N Signal Output Circuit
P1740 Torque Reduction Signal Circuit
P1743 TP Signal from ECM
P1760 TCM Supply Voltage Interrupted
P1779 Engine Torque Delivered to TCM Signal
P1780 Park/Neutral Position [PNP] Switch Circuit
P1781 Engine Torque Signal Circuit
P1790 Transmission Control Module Checksum
P1791 Transmission Control Module Loop
P1792 Transmission Control Module Reprogrammable Memory
P1792 ECM to TCM Engine Coolant Signal
P1793 Transmission Control Module Stack Overrun
P1795 CAN Bus – Throttle Body Position
P1800 TCM Power Relay Control Circuit
P1801 Performance Selector Switch Failure
P1804 Ground Control Relay
P1810 TFP Valve Position Switch Circuit
P1811 Maximum Adapt and Long Shift
P1812 Transmission Over Temperature Condition
P1813 Torque ControlP1814
P1814 Torque Converter Overstressed
P1815 Transmission Range Switch – Start In Wrong Range
P1816 TFP Valve Position Sw. – Park/Neu. With Drive Ratio
P1817 TFP Valve Position Sw. – Reverse With Drive Ratio
P1818 TFP Valve Position Sw. – Drive Without Drive Ratio
P1819 Internal Mode Switch – No StartWrong Range
P1820 Internal Mode Switch Circuit A Low
P1822 Internal Mode Switch Circuit B High
P1823 Internal Mode Switch Circuit P Low
P1825 Internal Mode Switch – Invalid Range
P1826 Internal Mode Switch Circuit C – High
P1831 PC Solenoid Power Circuit – Low Voltage
P1833 A/T Solenoids Power Circuit – Low Voltage
P1835 Kick-Down Switch Circuit
P1836 Kick-Down Switch Failed Open
P1837 Kick-Down Switch Failed Short
P1842 1-2 Shift Solenoid Circuit Low Voltage
P1843 1-2 Shift Solenoid Circuit High Voltage
P1844 Torque Reduction Signal Circuit Desired By TCM
P1845 2-3 Shift Solenoid Circuit Low Voltage
P1847 2-3 Shift Solenoid Circuit High Voltage
P1850 Brake Band Apply Solenoid Circuit
P1851 Brake Band Apply Solenoid Performance
P1852 Brake Band Apply SolenoidLow Voltage
P1853 Brake Band Apply Solenoid High Voltage
P1860 TCC PWM Solenoid Circuit Electrical
P1864 Torque Converter Clutch Circuit
P1868 Transmission Fluid Life
P1870 Transmission Component Slipping
P1871 Undefined Gear Ratio
P1873 TCC Stator Temp. Switch Circuit Low
P1874 TCC Stator Temp. Switch Circuit High
P1875 4WD Low Switch Circuit Electrical
P1884 TCC Enable/Shift Light Circuit
P1886 Shift Timing Solenoid
P1887 TCC Release Switch Circuit
P1890 ECM Data Input Circuit
P1890 Throttle Position Signal Input
P1891 Throttle Position Sensor PWM Signal Low
P1892 Throttle Position Sensor PWM Signal High
P1893 Engine Torque Signal Low Voltage
P1894 Engine Torque Signal High Voltage
P1895 TCM to ECM Torque Reduction Circuit

[It’s important to remember that this GM OBD2 codes list is for informational purposes only. It’s not a substitute for professional diagnostic advice. If you encounter a trouble code, it’s always recommended to consult a certified mechanic for proper diagnosis and repair.]

This GM OBD2 codes list provides a starting point for understanding potential issues with your General Motors vehicle. By using this list in conjunction with an OBD2 scanner and, when necessary, a professional mechanic, you can effectively diagnose and address car problems, keeping your GM vehicle running smoothly.


Disclaimer: This information is for informational purposes only and not intended as repair advice. We are not responsible for any actions taken on any vehicle based on this information. All content is copyright protected.

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