Tracking P0455 on Your 2022 Infiniti QX80
A P0455 on your 2022 QX80 indicates a large EVAP leak. The full-size luxury SUV with the 5.6L V8 on Nissan's F-Alpha platform uses Nissan's EVAP vent control valve system. Infiniti's warranty runs through 2026.
Clues
- Check engine light on
- P0455 stored in ECM
- Possible fuel smell
- Gas cap issue
Causes Ranked
- Gas Cap Seal (Very High Likelihood): Loose or worn. $0–$25.
- Vent Control Valve (Medium Likelihood): Nissan EVAP valve. $130–$280 installed.
- Purge Volume Control Valve (Medium Likelihood): Sticking. $120–$260 installed.
- Charcoal Canister (Low-Medium Likelihood): Saturation from the large fuel tank. $250–$450 installed.
- Fuel Tank Pressure Sensor (Low Likelihood): False reading. $140–$280 installed.
Diagnostic Approach
Gas cap first. If P0455 returns, CONSULT diagnostics or a smoke test will find the leak. The QX80's large fuel tank means more connections to inspect.
Warranty
Infiniti's 4yr/60k warranty runs through 2026. Federal emissions (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect the V8, 4WD, towing, or any features.