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2001 Pontiac Grand Prix 3.8L NSC - STALLING

My 2001 Grand Prix GT with 155K miles stalls repeatedly within 10-15 miles of each drive. It cuts out immediately...not a sputter. It consistently throws a P0101 MAF code and I must reset from my scanner to restart and be on my way. I have replaced the MAF sensor and checked the connector at the sensor for a loose or intermittent connection. I have replaced the PCM with a reman and flashed with the latest firmware. I've had it in a garage to take advantage of their diagnostic equipment and they suggested the new PCM, but have been doing all the work myself. At this point, I'm at a loss, but I keep reading about the crankshaft sensor being a potential for causing immediate stalls?? The P0101 code baffles me though. Any help would be appreciated. The car runs great otherwise. Thank you.

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  • Anonymous Apr 25, 2009

    I have the same problem with my 01 gpgt. It seems to only do it when the temperature outside is above 70??? not sure but i have a crank sensor and am goin to replace it

  • bclick Jul 04, 2009

    Paul...yes I did. The code P0104 indicated MAF sensor, but that wasn't it. A diagnostics check let one mechanic to recommend a new PCM/ECM module, which I changed out too. Nada. I finally surrendered and took it to my Pontiac dealer and it ended up being the least expensive sensor in the car...the MAP sensor. Manifold Absolute Pressure sensor. It's never happened since then and I had a master mechanic on one of these sites tell me that he had heard of that one other time. That as my deal...good luck.

  • paulp64131 May 11, 2010

    Did you ever find a solution? I have the very same problem on 2000 GP 3.8 It usually does it when my wife is in the car. So I try not to take her anywhere. This plan isn't working very well:) I don't have a clue what it could be.

  • Richard Scordino May 11, 2010

    Just for laughs, did you check to see if the fuel pump is working when it stalls?



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Posted on Jan 02, 2017

  • 11896 Answers

SOURCE: hard starting.. check engine on P0101

The filter is after the sensor. If the filter is dirty, it should be replaced anyways. If the sensor is covered in dirt, than yes clean it first.
Lastly replace MAF

Posted on May 09, 2009

  • 12 Answers

SOURCE: 2000 pontiac grand am stalling after couple miles


Posted on May 20, 2009

  • 58 Answers

SOURCE: 2001 pontiac grand prix stalls immediately after starting.

check the gas filter and change it

Posted on Sep 17, 2009

  • 22326 Answers

SOURCE: intermittent stall condition. worse after warm.

look around engine for any breather pipes ,they could be split and make sure you have a look and dont think i have already done it

Posted on Jun 03, 2010

  • 432 Answers

SOURCE: 02 Grand Prix GT 3800 starts and stalls

Id say maf again, due to the previous instance, however on a 3.8 i wouldnt be above checking the fuel pressure regulator for seeping through the vacuum hole. The boss has a 00 impala with a 3800 and my wife does both with 230k roughly on each, seen quite a few of those regulators and maf's over that time.

Posted on Jul 27, 2010

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