Thread: 2008 Grand Prix P0300 fault code

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  1. #1 2008 Grand Prix P0300 fault code 
    daviddawg
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    Default 08-30-2015
    Car started to idle rough the other day check engine came on and started flashing as I drove home.Hooked up my scanner and get a P0300 repeating code.Plugs and wires are new.Thanks for any help
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  2. #2 Re: 2008 Grand Prix P0300 fault code 
    Fivefingerdeathpunch
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    Default 08-30-2015
    What plugs?

    Double check that wires are fully on the plugs too.

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  3. #3 Re: 2008 Grand Prix P0300 fault code 
    daviddawg
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    Default 08-30-2015
    Spark plugs all plug wires connected good
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  4. #4 Re: 2008 Grand Prix P0300 fault code 
    Fivefingerdeathpunch
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    Default 08-30-2015
    So what plugs are they?

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  5. #5 Re: 2008 Grand Prix P0300 fault code 
    daviddawg
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    Default 09-08-2015
    Problem fixed ignition control module
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