The P0455 diagnostic trouble code indicates that the vehicle’s EVAP (Evaporative Emission Control System) has detected a large leak.
In simple terms, fuel vapors are escaping from the fuel system instead of being contained and recycled.
When P0455 appears, the Check Engine Light will illuminate.
Most vehicles continue to drive normally, but emissions will increase and repairs are recommended.
P0455 is one of the most frequently searched EVAP-related OBD2 trouble codes.

