P0455Low severity
Evaporative Emission System Leak Detected (Large Leak)
A large leak was detected in the EVAP system, most commonly caused by the fuel cap.
Common causes
- Missing, loose or faulty fuel cap
- Large crack in EVAP hose
- Faulty vent valve
Possible symptoms
- Check Engine Light on
- Fuel vapor smell
Code breakdown
P — System
Powertrain (engine, transmission, fuel & emissions)
0 — Type
Generic (SAE standard, common to all manufacturers)
4 — Subsystem
Auxiliary emission controls