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P0171, P0440, P0443 codes

This is a discussion on P0171, P0440, P0443 codes within the Engine forums, part of the W Body Tech category; I just got a 2000 Grand Prix Gt and a day later I blew the fuse to the fuel pump. ...

  1. 10-09-2012 #1
    stevenj
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    Default P0171, P0440, P0443 codes

    I just got a 2000 Grand Prix Gt and a day later I blew the fuse to the fuel pump. The guy I bought it from said he just put a new one in. He said it was a state vehicle and from the toggle switches I can tell. The fuse has blown several times but only in reverse. Now the car will just die while going forward but no blown fuse. Just looking for a place to start. If I let the car sit for a couple minutes it fires right up???
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  2. 10-09-2012 #2
    blueguy
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    Default Re: P0171, P0440, P0443 codes

    Google those codes.

    Look up what they are and what fixes them.

    Easy peasy.
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  3. 10-29-2012 #3
    stevenj
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    Default Re: P0171, P0440, P0443 codes

    It was the crank shaft positioning sensor that was killing the motor and a short in the wiring from the fuel pump that was blowing the fuse
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