Are you looking to delve deeper into your Honda’s diagnostics than the standard dashboard gauges allow? The On-Board Diagnostics II (OBD2) system in your Honda holds a wealth of data, and with the right tools and Honda Obd2 Pid List, you can access it. This guide will explore how to use custom OBD2 Parameter IDs (PIDs) to monitor parameters like transmission temperature, and other data not typically displayed by your vehicle.
Understanding OBD2 PIDs
OBD2 PIDs are codes used to request data from your vehicle’s computer. While there are standard PIDs defined for common parameters across all vehicles, manufacturers like Honda also utilize custom, or Mode 22, PIDs extensively. These custom PIDs unlock access to a broader range of sensors, counters, and valuable data points unique to Honda vehicles. This is incredibly useful for enthusiasts and those keen on monitoring specific aspects of their vehicle’s performance and health.
Tools for Accessing Honda Custom PIDs
To tap into these custom Honda OBD2 PIDs, you’ll need an OBD2 adapter, often referred to as an ELM327-compatible dongle, and software that supports custom PIDs. Popular choices include:
- Torque (Android): This app is widely used in the Android community and allows for the input of custom PID formulas.
- Car Scanner ELM OBD2 (iOS & Android): Car Scanner offers a user-friendly interface and the ability to add custom sensors, including automatic unit conversion which simplifies setup.
These tools connect to your Honda’s OBD2 port, typically located under the dashboard, and communicate with your vehicle’s computer using the ELM327 protocol.
Example Honda Custom OBD2 PIDs
Here’s a starting Honda OBD2 PID list to get you started with monitoring some key parameters. Note that applicability can vary based on your Honda model and year, particularly the transmission type (6-speed Automatic Transmission (6AT) vs. 9-speed Automatic Transmission (9AT)).
| Item | PID | Formula | Units | Custom Header | Applicable To |
|---|---|---|---|---|---|
| ATF Temperature | 222201 | C: AA F: AA*9/5-40 | °C/°F (offset from -40) | 6AT (2017-2019) | 6AT (2017-2019) |
| ATF Temperature | 223083 | C: O-40 F: 9/5*O-40 | °C/°F (offset from -40) | 9AT (2020+) | 9AT (2020+) |
| Current Gear | 222201 | AC | None, Range: 0-15 | 6AT (2017-2019) | 6AT (2017-2019) |
| Current Gear | 223086 | U | None, Range: 0-15 | 9AT (2020+) | 9AT (2020+) |
| AT Input Shaft Speed | 222201 | H*256+I | RPM (0-8000) | 6AT (2017-2019) | 6AT (2017-2019) |
| AT Output Shaft Speed | 222201 | J*256+K | RPM (0-8000) | 6AT (2017-2019) | 6AT (2017-2019) |
| Outside Air Temperature | 227028 | CarScanner: ShortSigned(Q,R) | °F/°C (Display Dependent) | 18DA60F1 | All ? |
| Cylinders Active (VCM) | 222615 | AY | # of Cylinders (3 or 6) | All ? | All ? |
| TPMS Pressures | 226001 | FL: K*256+L FR: I*256+J RL: O*256+P RR: M*256+N | kPa | 18DA26F1 | All ? |
| TPMS Temperatures | 226001 | FL: Z FR: Y RL: AB RR: AA | °C | 18DA26F1 | All ? |
Alt Text: ELM327 Bluetooth OBD2 adapter plugged into the OBDII port of a Honda vehicle, ready to read diagnostic data.
Understanding the Table Columns:
- Item: The parameter you are monitoring (e.g., ATF Temperature).
- PID: The Parameter ID code to request the data.
- Formula: The equation to convert the raw data into a readable value. ‘C’ and ‘F’ denote Celsius and Fahrenheit formulas respectively. Letters like ‘AA’, ‘AC’, ‘H’, ‘I’, etc., refer to bytes in the OBD2 response data.
- Units: The unit of measurement for the parameter.
- Custom Header: A specific header sometimes required for the OBD2 request. ’18DAEFF1′ or ’18DA60F1′, ’18DA26F1′ are common headers.
- Applicable To: Honda models and years where this PID is known to be applicable. ‘6AT’ refers to 6-speed automatic transmissions, ‘9AT’ to 9-speed automatic transmissions. ‘All?’ indicates potential broader applicability but requires verification.
Utilizing this Honda OBD2 PID list empowers you to monitor crucial aspects of your vehicle’s operation. For instance, keeping an eye on ATF temperature, especially when towing or under heavy load, can be vital for maintaining transmission health. Similarly, monitoring cylinder activity (VCM) can provide insights into your engine’s efficiency.
Expanding the Honda OBD2 PID Database
This list is just a starting point. The world of custom OBD2 PIDs is vast, and community contributions are essential to expanding our knowledge. If you discover or utilize other custom Honda OBD2 PIDs, please share them! By pooling our collective knowledge, we can create a more comprehensive resource for all Honda owners looking to understand their vehicles better.
Start exploring your Honda’s hidden data today and gain a deeper understanding of your vehicle’s inner workings with this Honda OBD2 PID list! Remember to always double-check compatibility with your specific Honda model and year.
Alt Text: Car Scanner app on a smartphone displaying real-time data from custom OBD2 sensors, showing ATF temperature and other parameters.
