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P0455 Diagnostic Trouble Code Discussion for June 2025

EVAP System Large Leak


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Trouble Ticket Help Requests for DTC P0455
Help Request Posted
2006 Honda Accord LX Special Edition 2.4L MIL Lamp on VIN: 1HGCM56396
P0455: EVAP System Very Large Leak Detected. I'm not sure what I'm missing. P0455 large leak detected. Closed vent valve with scan tool, smoke tested system at line at purge valve all the way back. No leaks. Purge valve is not leaking and can be commanded on with the engine running and vacuum is puls...
June 16, 2025