OBD codes / P0455
P0455
MinorEvaporative Emission System Leak Detected (Large Leak)
Usually safe to drive; fix at your convenience.
Likely causes
- missing/loose gas cap
- cracked EVAP hose
- faulty valve
Common fixes
- tighten/replace gas cap
- inspect hoses
Seeing P0455 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0455 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.