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  1. KK Liberty Forum
    Hi all, My 2012 KK is not charging. I think I need a new PCM, and I'm curious if I'm missing anything before I go buy a new one. The day I first got a low battery signal I replaced the battery, original was 10yrs old so it was time anyway. After I put a new battery in, the alternator got REALY...
  2. KK Liberty Forum
    Alternator and battery are brand new. Through process of elimination, I believe I have narrowed it down to the alternator is not receiving the control signal. I need to test the continuity of the 2 wires that connect to the alternator but I don’t have the wiring diagrams to figure out which PCM...
  3. KJ Liberty Forum
    Hey Y'all! Been a while since needing advice! Having a Cylinder #6 Misfire. Even my Mechanic is stumped. He's ran Computer Diagnostics Twice now. Original diagnosis was Short Circuit on the PCM. I replaced the unit and it threw codes for the entire Passenger side bank. Both PCMs at least...
  4. Jeep Grand Cherokee & Commander Forums
    Hey Jeep Forum! Came across this group by recommendation from another Jeep group on Reddit - glad I got the rec because this site is chock-full of good info (aka glad to be here!) I have posted versions of my dilemma in some other places but my main question has evolved a bit and now I am...
  5. TJ Wrangler Technical Forum
    Hello! I'm in the process of an LS swap. I started with the stock 4.0L 42RE auto and have installed a 2005 5.3L / 4l60E using many parts from Novak Industries for the swap. I intend to keep the Jeep wiring harness to retain factory gauges/controls along with the re-worked (by Novak) GM harness...
  6. Engines & Drivetrain
    Hello all, I purchased a 2007 Jeep with 180,000 miles on it and it had a engine light on and when check was throwing a P0882 code and is stuck in 4th gear in limp mode. Originally the codes were: P0882, P0846, P0871, P0988, and P0876. I was able to reset all but P0882 and have tried the...
  7. WK Grand Cherokee & XK Commander Forum
    Morning everyone, working on a PCM ground wire issue issue and am hoping someone can help. Basically, the ground’s not connected and I’m not sure where it goes. As backstory, my 2005 WK 5.7L’s (bought used, 162K miles) is not cranking over. I’ve changed the battery and am running through some...
  8. TJ Wrangler Technical Forum
    Hi folks, been a few years since I was on this forum last, but I got some bad news today and may need some advice, of both the mechanical and philosophical variety. I'll try to be succinct. 06' Wrangler Unlimited. I bought it brand new off the lot many years ago, I'm the only owner and I want...
    pcm
  9. TJ Wrangler Technical Forum
    This one's been a month's long doozy. I'll try and make it quick: Starting Aug. 2019, my 2000 Jeep Wrangler Sport MT 4.0L went dead on the highway while I was going about 40 mph. Immediately, a check engine light threw a P0340 code for the camshaft position sensor. I replaced the sensor, all...
  10. TJ Wrangler Technical Forum
    I just bought a used jeep, and have been going through this nightmare recently. I have a 2004 TJ 4.0 liter automatic transmission, it has been driving around in second gear, after about 20-30mph the rpm will go over 2000 and up. A buddy of mine plugged in his reader and found the error code...
  11. WK Grand Cherokee & XK Commander Forum
    Hey Guys, I got into my Jeep last week and turned the ignition switch. It started up fine and died off about three seconds into running. This happened twice. I tried to get a jump just to see if that would work. Now it does not even start. This week I had it towed to a Big O Tires because I...
  12. XJ Cherokee Technical Forum
    Hi Jeep Forum, I drive a 2000 Cherokee Sport 4WD 6 cylinder 4.0L. I took it to the mechanic the other day to get a check engine light problem addressed and asked them to pull the error code as I couldn't remember what it was. They couldn't get a reading, and said my PCM was bad. The shop...
  13. TJ Wrangler Technical Forum
    New to the Site. I just bought a used 06 Wrangler, and it drove great for the first few days, but was having some weird electrical problems. I pulled the battery and had it tested and it was found to be a bad battery (had corrosion and such also). I cleaned the battery ports etc, and it...
  14. KJ Liberty Forum
    04 Liberty Renegade 3.7L Can someone point me in a good direction for a replacement PCM? Thank You
  15. YJ Wrangler Technical Forum
    I purchased a 1989 Jeep Wrangler (YJ) with a manual transmission that apparently had an engine swap. The current engine is a 1992 4.0 inline 6. We have had trouble with the PCM as in every time we go to get it going it seems to fry. We are getting a new wiring harness (should I even bother...
  16. WK Grand Cherokee & XK Commander Forum
    Good evening fellow Grand Cherokee enthusiasts. I'm hoping someone here can give me a hand with my issue. I have replaced the engine on my '06 3.7L G.C. a couple of weekends ago and seem to have inadvertently pinched a wire or something similar. I was driving home from work this evening when the...
  17. TJ Wrangler Technical Forum
    I have a 2006 TJ and the locking mechanism for the pcm connectors broke. Not the red tab but the actual part of the connector. I’ve searched everywhere and can’t find replacement ones. Any advice?????
  18. TJ Wrangler Technical Forum
    Hi everyone, Last Monday I drove my 2003 TJ Sport to work, and 8 hours later tried to drive home, but it wouldn't start or crank. All of the lights, gauges, etc. would work, but it simply wouldn't crank. I also never heard the solenoid click, but instead would just hear a clicking sound from...
  19. ZJ Grand Cherokee Forum
    I have been for a while trying to track down a issue and it is being very elusive. I see all kinds of tools to get real time data from a ODBII but how about the ODBI? I must be having some kind of sensor issue but I cannot determine what one. What is happening is my mileage just tanks, and my...
    pcm
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