Honda vehicles, like many others, utilize custom OBD2 Parameter IDs (PIDs) beyond the standard set defined by the Society of Automotive Engineers (SAE). These custom PIDs provide access to a wealth of valuable data about your vehicle’s performance, allowing for more in-depth monitoring and diagnostics. This comprehensive guide focuses on deciphering the Honda Obd2 Pid List, empowering you to tap into this hidden information using an OBD2 scanner and compatible software.
Understanding Honda’s Custom OBD2 PIDs
While standard OBD2 PIDs provide general information like engine speed and coolant temperature, Honda’s custom PIDs delve deeper, offering insights into specific systems like the transmission and TPMS. Accessing this data requires a compatible OBD2 scanner and software capable of interpreting custom PIDs. Popular options include Torque (Android) and CarScanner (iOS), which work with ELM327-compatible dongles. These tools connect to your vehicle’s OBD2 port and decode the data stream.
Decoding the Data: Formulas and Units
Raw data retrieved from custom PIDs often requires conversion using specific formulas to represent meaningful values like temperature or speed. For instance, transmission fluid temperature might be represented by a hexadecimal value that needs to be converted to degrees Celsius or Fahrenheit. The table below provides examples of Honda OBD2 PIDs, their corresponding formulas, and units:
| Item | PID | Formula | Units | Custom Header | Applicable To |
|---|---|---|---|---|---|
| ATF Temp | 222201 | C: AA F: AA*9/5-40 | °C/F | 6AT (2017-2019) | |
| ATF Temp | 223083 | C: O-40 F: 9/5*O-40 | °C/F | 9AT (2020+) | |
| Current Gear | 222201 | AC | None (0-15) | 6AT (2017-2019) | |
| Current Gear | 223086 | U | None (0-15) | 9AT (2020+) | |
| AT Input Shaft Speed | 222201 | H*256+I | RPM | 6AT (2017-2019) | |
| AT Output Shaft Speed | 222201 | J*256+K | RPM | 6AT (2017-2019) | |
| Outside Air Temp | 227028 | CarScanner: ShortSigned(Q,R) | °F/C | 18DA60F1 | All? |
| Cylinders Active (VCM) | 222615 | AY | # of Cylinders | All? | |
| TPMS Pressures | 226001 | FL: K256+L FR: I256+J RL: O256+P RR: M256+N | kPa | 18DA26F1 | All? |
| TPMS Temperatures | 226001 | FL: Z FR: Y RL: AB RR: AA | °C | 18DA26F1 | All? |
Software like CarScanner simplifies this process by automatically converting units based on your preferences. You only need to specify the native unit of the PID.
Considerations for Different Honda Models
The specific PIDs available and their interpretations can vary between different Honda models and years. For instance, transmission-related PIDs will differ significantly between models equipped with a 6-speed automatic transmission and those with the 9-speed ZF transmission. It’s crucial to consult model-specific documentation or online forums for accurate information.
Utilizing the Honda OBD2 PID List
Accessing Honda’s custom OBD2 PIDs opens up a world of possibilities for monitoring and understanding your vehicle’s performance. From monitoring transmission fluid temperature to tracking individual tire pressures, this data empowers you to proactively maintain your Honda and potentially diagnose issues before they become major problems. Remember to always consult reliable sources for accurate PID information and exercise caution when interpreting data.
