2007 Pontiac Grand Prix GXP Sedan Logo
Dannelle Bruton
Dannelle Bruton Posted on Jan 24, 2012
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What is code PO496 and PO455 for a 2007 Pontiac Grand Prix mean

Check engine light on

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3 Answers

Marvin

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  • Pontiac Master 85,242 Answers
  • Posted on Jan 24, 2012
Marvin
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P0496 is not alisted code.
P0455 - Evaporative Emission Control System Leak Detected Gross Leak (fuel vapors)
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors Possible causes - Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking

Ricky Peters

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  • Pontiac Master 2,620 Answers
  • Posted on Jan 24, 2012
Ricky Peters
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Your gas cap is either not tight or needs to be replaced.You have a fuel vapor leak in the evaporator emissions system.

  • Marvin
    Marvin Jan 24, 2012

    This is by no means the only cause of the code, the gas cap is just one source of any leak that is detected.

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  • Posted on Jun 10, 2013
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Po496 evaporative emission sisten high purge flow

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