Thread: Check Engine code P0499 and P0455 P0455p

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  1. #1 Check Engine code P0499 and P0455 P0455p 
    itzharrison
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    Default 09-07-2014
    My 07 GT is throwing out three codes P0499 p0455 and p0455p its not the gas cap. please help.
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  2. #2 Re: Check Engine code P0499 and P0455 P0455p 
    Scottydoggs
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    Default 09-07-2014
    could be the canister in the quarter panel under the gas door. or its solenoid on top of it. or the purge solenoid on the engine.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  3. #3 Re: Check Engine code P0499 and P0455 P0455p 
    BillBoost37
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    Default 09-08-2014
    Would you please list the descriptions for the codes.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  4. #4 Re: Check Engine code P0499 and P0455 P0455p 
    itzharrison
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    Default 09-08-2014
    P0499 Evaporative Emission System Vent Valve Control Circuit High

    p0455 This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected.
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  5. #5 Re: Check Engine code P0499 and P0455 P0455p 
    BillBoost37
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    Default 09-08-2014
    I'd check the wiring at the vent valve (which Scott is kinda mentioning) and if that's sticking open causing a high, then there's both issues.
    I drink..so consider that when reading my posts.

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