Mechanics

MY CHECK ENGINE LIGHT CAME ON AND THE CODE READING IS PO455.

2007 Chevrolet Impala

It started out with a bad gas cap. Went to auto zone and they sold me the wrong cap that wasnt pressurized. I drove for 3 weeks like that. Put the right cap on and my code hasnt reset and now it states tha its gross evaporitive system leak.
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Paulinehill
May 13, 2012.




Most likely the gas cap was not the issue. You need a shop with a scan tool, smoke machine and voltmeter to determine the failure and tell you the exact failure.

Roy

ASEMaster6371
May 13, 2012.


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