Thread: My 2008 GrandPrix GXP

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  1. #1 My 2008 GrandPrix GXP 
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    Ive been having issues after my oil and air filer were changed last month..Found my oil filter was out a little but my car is still saying reduced engine power..It surges then bogs down..I had someone run a code on it and it said Throttle position censor a and b..Can someone help??? I would like to fix this on my own and prove to my hubs I can.
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  2. #2 Re: My 2008 GrandPrix GXP 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    From the little info you gave me, it sounds like either the pedal postion sensor or the throttle body itself is bad. Your GXP being a drive by wire car instead of by a cable uses 2 sensor to figure out how far you are pushing down the pedal thus telling the Throttle body to open a certain amount.

    Without the code number its had to say if its the PPS or the throttle body.

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