P0455 — Evaporative Emission System Leak Detected (Large Leak)
Reviewed1 source
1 source
- Official data (NHTSA)official_feed
What P0455 means
Safe to drive short-term
Same family as P0442, but a larger leak — often an open fuel cap or a disconnected hose.
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General information, not a diagnosis or repair instruction. Always confirm with a qualified mechanic for your specific vehicle.
Common causes
- Disconnected or cracked EVAP hose
- Open or missing fuel cap
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