P0455
GENERIC DTC · Evaporative emissions
EVAP system large leak detected
Ce que le code signifie
The fuel-vapor system could not establish or retain the expected sealed condition.
Gravité et conduite
Schedule promptly; stop for liquid fuel leakage
Causes possibles
- Missing/loose fuel cap
- Disconnected EVAP hose
- Stuck vent valve
- Larger canister or line leak
Prochaines vérifications
- Confirm cap installation if the vehicle uses one
- Do not work around fuel vapor ignition sources
- Professional smoke test if code returns
Source et limite
Code structure follows SAE J2012. Manufacturer-specific definitions, pinpoint tests, wiring, torque, fluids, and repair procedures require authoritative information for the exact vehicle.
SAE J2012 Diagnostic Trouble Code DefinitionsReviewed 2026-08-13