My check engine light came on and the code reading is PO455.

PAULINEHILL

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.

1 Reply

ASEMASTER6371

EXPERT
25,494 POSTS

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

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My check engine light came on and the code reading is PO455.

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.

1 Reply

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

Please login or register to post a reply.

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My check engine light came on and the code reading is PO455.

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.

1 Reply

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

Please login or register to post a reply.

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2007 Chevrolet Impala Check Engine Light Says On

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My Engine Light Came On At 120000. What Does That Mean

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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