Thread: P0171, P0440, P0443 codes

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  1. #1 P0171, P0440, P0443 codes 
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    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. #2 Re: P0171, P0440, P0443 codes 
    The Blue One blueguy's Avatar
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    Google those codes.

    Look up what they are and what fixes them.

    Easy peasy.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  3. #3 Re: P0171, P0440, P0443 codes 
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    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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