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Refurbished PCMs Bad!!???!!

Discussion in 'Electrical' started by Jrgabriel, Nov 17, 2019.

  1. Nov 17, 2019 at 6:30 PM
    #1
    Jrgabriel

    #1
    Jrgabriel [OP] Well-Known Member

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    I believe I keep having problems related to a PCM replacement. On the second refurbished one in 6 months!!?? Has anyone heard of the 2011 Jeep Grand Cherokee PCMs being a 50/50 bad because of soldering? Having P0339 and P0340 codes and sensors replaced five times...just to have the car run rough and engine light go back on after driving 200-400 miles.

    anyone with experience...input is much appreciated!!
     
    Jrgabriel, Nov 17, 2019
    #1
  2. Nov 18, 2019 at 2:13 PM
    #2
    Jim Beam

    #2
    Jim Beam Well-Known Member

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    I had a pcm replaced in a '07 Grand and the dealer had to install it.
     
    Jim Beam, Nov 18, 2019
    #2
  3. Nov 18, 2019 at 2:30 PM
    #3
    Jrgabriel

    #3
    Jrgabriel [OP] Well-Known Member

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    Do you know much about Jeeps? I’m having the check engine light keep coming on and car is running rough in that 55-75+ range.

    I’ve posted about this in other threads. For some reason it seems like an alternator and pcm change caused a PO339 code . Now engine light on with seatbelt light flashing.
     
    Jrgabriel, Nov 18, 2019
    #3
  4. Nov 19, 2019 at 12:47 PM
    #4
    Jim Beam

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    Jim Beam Well-Known Member

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    That is a crankshaft position sensor intermittent failure code, look it up. Not a good thing, go see the dealer. They are the specialists, or claim to be. When the dealer replaces the computer, it has to get what is called reflashed. When I had the dealer install the computer in my Grand, it did not solve the problem, but trading it in did.
     
    Jim Beam, Nov 19, 2019
    #4
    aggrex and JKBob 25 like this.
  5. Nov 19, 2019 at 5:49 PM
    #5
    aggrex

    #5
    aggrex Well-Known Member

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    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    Ain't that the truth! When the authorized jeep dealer can't successfully reflash + resolve the PCM the best fix is unload the problem.
     
    aggrex, Nov 19, 2019
    #5
  6. Nov 19, 2019 at 8:36 PM
    #6
    Jrgabriel

    #6
    Jrgabriel [OP] Well-Known Member

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    That really isn’t an option...I just bought the vehicle and it is not paid for. I don’t really know what to do. I do suspect problems with the PCM and/or a short...or alternator or battery. Why would my battery be good but at 41% after a load test.
     
    Jrgabriel, Nov 19, 2019
    #6
  7. Nov 19, 2019 at 8:43 PM
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    Jrgabriel

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    Jrgabriel [OP] Well-Known Member

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    Today when I had it scanned it threw a P0334 code and battery was tested (guy said it tested good but was at 41%) and he said alternator tested good. I brought car home and then an hour later wife goes to go to work and it is dying out and stalling. I put a trickle charge on the battery and removed the cables. When I put cables back on engine light was off and car started up. I was about to go for a test drive and as I got to end of driveway engine light came back on. I turned it off and locked up I noticed that I have a blinking red light on that never appeared before when locking car. Interesting.
     
    Jrgabriel, Nov 19, 2019
    #7
  8. Jan 3, 2020 at 9:15 PM
    #8
    Jrgabriel

    #8
    Jrgabriel [OP] Well-Known Member

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    This is starting to look like what I need to do
     
    Jrgabriel, Jan 3, 2020
    #8
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