Thread: Engine Codes P0171 and P0102 need help

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  1. #1 Re: Engine Codes P0171 and P0102 need help 
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    Hi, I have a similar problem as I first had a P0102 code. I actually replaced my MAF sensor with a used one from the junkyard. It came of a 3.8 Camaro and the part numbers matched. After installing it, it threw another code P0171 which to my understanding is also MAF related. Should I just buy a brand new one? I'm really trying to save myself a $150 investment. I recently replaced all the vacuum hoses and checked for leaks.

    Before replacing the MAF the car ran fine but would stall only in cold and high moisture conditions. I did the unplug test, with no difference. That told me that I needed to replace the MAF. Now the car is idling rough, but not stalling anymore. Thus, giving me P0171.

    *Note: 1999 Pontiac Grand Prix GTP (VIN "1")
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  2. #2 Re: Engine Codes P0171 and P0102 need help 
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    Here is how to check with a meter :

    Part 1 -MAF Sensor Test: GM 3.3L, 3.8L
    1997 Red GTP 182000 miles stock
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