This only happens when the I drive the car, park it for 5mins jump back in and start it up. I have replaced the gas cap and its still pulling the codes
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2004 Pontiac GTO Question: The car is pulling obd code p0455 and p0455pd
Answer #1Angelo2975 September 14, 2011, 13:15Technician
P0455 EVAP LARGE LEAK DETECTED, eVAP SYSTEM IS UNABLE TO ACHIEVE VACCUM DURING DIAGNOSTIC MODE. You might want to take it to a shop for them to perfom Evap performance test.
Answer #2chinasinoy September 14, 2011, 23:00Journeyman
this obd2 trouble code table can help you understand the meaning of code,
and for this code, I think you can try this,
Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
Otherwise, replace the gas cap, and/or
Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary