OBD codes / P0442
P0442
MinorEvaporative Emission System Leak Detected (Small Leak)
Usually safe to drive; fix at your convenience.
Likely causes
- loose/worn gas cap
- small hose crack
- purge/vent valve
Common fixes
- replace gas cap
- smoke-test EVAP
Seeing P0442 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0442 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.