Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2008 Honda Ridgeline RTFACTORY OEM SERVICE PROCEDURE
DTC Troubleshooting: Notes
DTC INDEX
| DTC | Description |
|---|---|
| DTC P0443 | EVAP Canister Purge Valve Circuit Malfunction |
| DTC P0451 | FTP Sensor Range/Performance; Problem |
| DTC P0452 | FTP Sensor Circuit Low Voltage |
| DTC P0453 | FTP Sensor Circuit High Voltage |
| DTC P0455, P0456 | EVAP System Large Leak Detected; EVAP System Very Small Leak; Detected |
| DTC P0457 | EVAP System Leak Detected/Fuel Fill Cap Loose or Missing |
| DTC P0496 | EVAP System High Purge Flow |
| DTC P0497 | EVAP System Low Purge Flow |
| DTC P0498 | EVAP Canister Vent Shut Valve Control Circuit Low Voltage |
| DTC P0499 | EVAP Canister Vent Shut Valve Control Circuit High Voltage |
| DTC P1454, P2422 | FTP Sensor Range/Performance Problem; EVAP Canister Vent Shut Valve Close Malfunction |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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