For Honda vehicle owners seeking to delve deeper into their car’s diagnostics and performance metrics beyond the factory displays, the power of custom OBD2 PIDs combined with tools like Torque Car Scanner (specifically the Torque Pro app on Android) and CarScanner (for iOS) opens up a world of possibilities. This guide explores how you can leverage these tools and custom Parameter IDs (PIDs) to monitor parameters your Honda doesn’t natively show, such as transmission temperature, and much more.
OBD-II PIDs, as detailed on Wikipedia (https://en.wikipedia.org/wiki/OBD-II_PIDs), are standardized codes used to request data from a vehicle’s computer. Manufacturers like Honda often implement custom Mode 22 PIDs to access a wider range of sensor data not included in the standard PID set. This is where apps like Torque Car Scanner and CarScanner become invaluable. Paired with an ELM327-compatible OBD2 adapter (typically Bluetooth or WiFi), these apps can read real-time data from your Honda’s OBD port using these custom PIDs.
CarScanner provides user-friendly instructions on adding custom sensors (Custom sensors (PIDs) – Car Scanner ELM OBD2), simplifying the process of inputting PIDs and formulas. A notable feature of CarScanner is its automatic unit conversion. You can input the native unit of a sensor (e.g., Celsius) and set your desired display unit (e.g., Fahrenheit), and the app handles the conversion, eliminating the need to include conversion formulas in the PID setup itself.
Torque Car Scanner, on the other hand, utilizes formulas and equations as documented in their wiki (Equations – Torque Wiki). Understanding these equations is key to correctly configuring custom PIDs within the Torque Pro app.
While ScanGauge also offers custom PID functionality, their approach often involves a degree of obfuscation, making it challenging to transfer their PID information to other scan tools.
The following custom OBD2 PIDs are primarily applicable to 2nd Generation Honda Ridgelines (2017-2024), but some may also be relevant to later 1st Generation models (2009+ which use CAN 29-bit protocol ISO 15765-4; earlier 1st Gen models used ISO 9141). Be aware that certain parameters, particularly transmission-related PIDs, will differ significantly between 6-speed automatic transmissions (6AT) and 9-speed automatic transmissions (9AT) found in different Ridgeline model years, as the 9AT uses a separate Transmission Control Module (TCM) with distinct PIDs. It’s generally observed that ELM327 dongles often use 18DAEFF1 as a default header, though this may vary.
| 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 Ridgeline |
| ATF Temperature | 223083 | C: O-40 F: 9/5*O-40 | °C/°F (offset from -40) | 9AT | 2020+ Ridgeline |
| Current Gear | 222201 | AC | None (Range: 0-15) | 6AT | 2017-2019 Ridgeline |
| Current Gear | 223086 | U | None (Range: 0-15) | 9AT | 2020+ Ridgeline |
| AT Input Shaft Speed | 222201 | H*256+I | RPM (0-8000) | 6AT | 2017-2019 Ridgeline |
| AT Output Shaft Speed | 222201 | J*256+K | RPM (0-8000) | 6AT | 2017-2019 Ridgeline |
| Outside Air Temperature | 227028 | CarScanner: ShortSigned(Q,R) | °F/°C (Display Setting) | 18DA60F1 | All Ridgeline Models? |
| Cylinders Active (VCM) | 222615 | AY | # of cylinders (3 or 6) | All Ridgeline Models? | |
| TPMS Tire Pressures | 226001 | FL: K * 256 + L FR: I * 256 + J RL: O * 256 + P RR: M * 256 + N | kPa | 18DA26F1 | All Ridgeline Models? |
| TPMS Tire Temperatures | 226001 | FL: Z FR: Y RL: AB RR: AA | °C | 18DA26F1 | All Ridgeline Models? |
This table provides a starting point for customizing your Honda Ridgeline monitoring with Torque Car Scanner or CarScanner. By inputting these PIDs and the corresponding formulas into your chosen app, you can gain access to a wealth of data previously hidden from view, enhancing your understanding of your vehicle’s operation and health. Stay tuned for more custom PIDs and expanded compatibility information in future updates. Are there any specific Honda parameters you’re interested in monitoring? Let us know your requests!
