Thread: Engine Code P0440...HELP

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  1. #1 Engine Code P0440...HELP 
    JakeH0605
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    Question 12-29-2011
    Just purchased a 2005 Grand Prix yesterday and at the dealership a Engine Code P0440 came up. The gas cap tightened and the mechanic added some grease to the seal to solve the problem and cleared the code. When I filled the tank today the Engine Light came back on, assuming it is the same code. What is recommended to solve this problem and do I need to worry?
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  2. #2 Re: Engine Code P0440...HELP 
    boostedcompg
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    Default 12-29-2011
    get a new gas cap
    04 comp G, front/rear towerbraces, pacesetters, ported sc, LIM, 3.3 pulley, 1.9 mod rockers, Ls1 springs and retainers, custom dyno tune, 180 tstat, shortned dog bones, full poly mounts, zzp shift kit, custom fwi, 28inch cherry bomb, flowmaster 40's. 290whp 380wtq before the button. coldfusion n2o, 60 shot. I haz corvette brakezand gxp cluster! smgpfc028
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  3. #3 Re: Engine Code P0440...HELP 
    kyleinkman
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    Default 12-29-2011
    also check o2 sensor and your fuel injectors for leaks its an evap code
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