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Po455 - 2005 Chevrolet Colorado

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PO455 possible cause evaporative emission system (EVAP)
unable to reach calibrated vacum level...check hoses for cracks or leaks

Posted on Nov 27, 2008

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Code po455


Code 455 means there is a large leak in the evap system. The evap system is how the computer vents the gas tank to the vapor canister. The system would need to be pressure tested.

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What does the code PO455 mean?


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The old days left in 1981 some 32 years ago

You really have to smoke test the Evap System to
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Without a system diagram your pretty much lost

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