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Old 03-14-2017, 06:09 AM
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Originally Posted by Mattaeus View Post
Can't you just go to a junk yard and pull a pcm from anything with a 42rle and tcm integrated pcm? Program it of course once installed.

Charger, Magnum, Liberty, Grand Cherokee, Nitro, Dakota, Ram, 300
I don't know the answer to this question.

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Old 03-14-2017, 07:44 AM   #62
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UPDATE: It's been about 3 weeks and ZERO issues. The new PCM has been perfect. I fully expected to go through a few PCM's to get a good one, but so far, so good.
That's great! Hopefully there is a fix to this problem. Please keep us updated...How many miles have you put on it? I think you are out of the woods if you go over 1k miles...

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Old 03-14-2017, 09:41 AM
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That's great! Hopefully there is a fix to this problem. Please keep us updated...How many miles have you put on it? I think you are out of the woods if you go over 1k miles...
I've driven about 500 miles since the new PCM. My LJ will hit 20,000 miles by the end of the month!!
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Old 03-26-2017, 12:53 AM
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All is well. Just went over 20,000 miles.
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Old 03-26-2017, 12:27 PM   #65
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UPDATE: It's been about 3 weeks and ZERO issues. The new PCM has been perfect. I fully expected to go through a few PCM's to get a good one, but so far, so good.
That is encouraging news. Very encouraging. Assuming it's a reman PCM as my understanding is that there are no more new ones left.

Also, can you share a rough ballpark on cost for parts / labor to replace PCM? I'm guessing somewhere north of $1k, but curious.

Thanks, and great to hear you have a potential solution to yours.
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Old 03-26-2017, 04:34 PM
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That is encouraging news. Very encouraging. Assuming it's a reman PCM as my understanding is that there are no more new ones left.

Also, can you share a rough ballpark on cost for parts / labor to replace PCM? I'm guessing somewhere north of $1k, but curious.

Thanks, and great to hear you have a potential solution to yours.
It's in post #55. $1517.33. Reman from MOPAR.
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Old 03-26-2017, 04:38 PM   #67
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It's in post #55. $1517.33. Reman from MOPAR.
Sorry....guess I didn't review back far enough.

Thanks for the info, and good luck!
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Old 03-27-2017, 03:41 AM   #68
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Great, you have it fixed. Well worth the $1500! Will a reman from another source work or must you stick with mopar?
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Old 03-27-2017, 03:15 PM
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Great, you have it fixed. Well worth the $1500! Will a reman from another source work or must you stick with mopar?
I also covered my thoughts on that in post #55. I chose to use MOPAR through a dealership because, aftermarket PCM companies have horrific BBB reviews and restructure every couple years. A lifetime warranty from a company that is out of business every couple years is no warranty. and my dealership will be there tomorrow and next year.
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Old 03-29-2017, 09:05 PM   #70
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OldPueblo - awesome you are back up and running. I have been following this thread but have not posted since July. I can happily report that sometime around September my car stopped producing the error codes and has driven well since.

I did not do anything to the Jeep, just oil changes. I can't understand why any of this happened, nor do I know what fixed the problem.

Recently I had a P0016 code appear and we changed the OPDA with a Mopar OEM version. Car runs great. Next up is a new clutch and flywheel as I think all of that shuttering in 1st and 2nd gears may have shortened the life. Picked up a Sachs clutch kit and Mopar flywheel.

If anything else pops up I will be sure to post.
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Old 05-05-2017, 12:38 AM
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UPDATE:::: No issues. Recently regeared to 4.88. This thing is FUN!!!

Looking forward to a Gr8top Safari top, some new bumpers, and a supercharger.
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Old 05-17-2017, 01:33 PM   #72
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I'm on my second PCM and it is faulty as well. I live in KY and it was September 2015 when the replacement PCM was installed. All was well until April/May 2016. I spent all summer resetting the PCM until October 2016 rolled around. I made my last reset in OCT (outside temps now are in the 40's and 50's. The LJ ran flawlessly all winter long until spring temps started to reach 70's & 80's. Well we are now in Mid May 2017 and central KY temps are consistently averaging 70's & 80's and I'm back to resetting the PCM ever 3 days or so.

I really think the issue is tied to outdoor temps. I can definitely say my LJ likes the cooler temps much better the warmer ones.
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Old 05-18-2017, 04:57 AM
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I'm on my second PCM and it is faulty as well. I live in KY and it was September 2015 when the replacement PCM was installed. All was well until April/May 2016. I spent all summer resetting the PCM until October 2016 rolled around. I made my last reset in OCT (outside temps now are in the 40's and 50's. The LJ ran flawlessly all winter long until spring temps started to reach 70's & 80's. Well we are now in Mid May 2017 and central KY temps are consistently averaging 70's & 80's and I'm back to resetting the PCM ever 3 days or so.

I really think the issue is tied to outdoor temps. I can definitely say my LJ likes the cooler temps much better the warmer ones.
Get a Mopar reman this go around. It would have been warranted and replace free of charge.

Somewhere in this thread I posted a link the the cheapest FACTORY MOPAR PCM available....

2005 and 2006 Auto Wrangler owners need to surround Jeeps headquarters with torches and pitchforks. They know, and don't care.

Keeps us updated......
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Old 05-18-2017, 09:06 AM   #74
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I spent all summer resetting the PCM until October 2016 rolled around. I made my last reset in OCT (outside temps now are in the 40's and 50's. The LJ ran flawlessly all winter long until spring temps started to reach 70's & 80's. Well we are now in Mid May 2017 and central KY temps are consistently averaging 70's & 80's and I'm back to resetting the PCM ever 3 days or so.

I really think the issue is tied to outdoor temps. I can definitely say my LJ likes the cooler temps much better the warmer ones.
This is my deduction too. I'm up in Mass and haven't had a PCM issue since last October, when Mass got cold and stayed cold until yesterday, when I noticed the always-on engine light went dark (it didn't hard shift though). I won't be driving the LJ again until Saturday (I am issued a take-home work car), and since the temp here will be mid-70s, I'm expecting the clunk this weekend.

My PCM issue is seemingly outside-temperature-related. If it's warm outside, the LJ will clunk. If it's cold outside, all is smooth.

OLD PUEBLO: I'm very happy for you that your PCM issue got fixed. And once again: thanks for starting and FOLLOWING thru on this thread.
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Old 05-18-2017, 09:35 AM   #75
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I think the key if there is a problem, buy a oem pcm going into hot weather. You have a warranty, so you can get through a few until you find one that works. Expensive, but you really have no other option.
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Old 06-01-2017, 04:18 PM   #76
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UPDATE:::: No issues. Recently regeared to 4.88. This thing is FUN!!!

Looking forward to a Gr8top Safari top, some new bumpers, and a supercharger.
Dropped mine off this morning for ECM #2 and OPDA #2... Fingers crossed.
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Old 06-02-2017, 12:51 AM
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Dropped mine off this morning for ECM #2 and OPDA #2... Fingers crossed.
How long did your last PCM make it?
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Old 06-02-2017, 07:58 AM   #78
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How long did your last PCM make it?
It's been in for a year but it was never right. It never solved my issue. I've been doing the battery disconnect for a year. It's not a DD so it wasn't killing me. I finally decided it needed to be done before my shop wouldn't warranty it anymore and since I had to take it in again due to the new OPDA leaking, I asked them to go ahead.
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Old 06-18-2017, 08:46 AM   #79
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The fun continues

The problem is already back with the "new" PCM. Not quite as frequent as normal but it's back for sure. Pissed.
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Old 06-19-2017, 06:40 PM   #80
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Can anyone verify that the white cable goes back into the blue/ gray slot? I got my PCM repaired and if all goes well, I will post an udpate here.



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[IMG]<a data-flickr-embed="true" href="https://www.flickr.com/photos/luvnsurf/34604238603/in/dateposted/" title="Untitled"><img src="https://c1.staticflickr.com/5/4242/34604238603_2250f32a22_k.jpg" width="1536" height="2048" alt="Untitled"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>[/IMG]
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Old 06-19-2017, 06:45 PM   #81
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I tried to post a picture but it did not work, if you click on the https: link, it will take you to the photo. I tried to edit my post but I am not allowed.
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Old 06-19-2017, 07:50 PM   #82
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One key question is why most if not all of the occurrences are in 06 and never seen a post about same problem actually occurring in an 05

What is different about 06
Is it a PCM / PCM programing difference or a tranny difference

Best I can tell no documented difference yet problem seems exclusive to 06 4.0 auto




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Old 06-20-2017, 07:03 AM
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As of today, My LJ is still trouble free.

It's a frustrating issue. What really bothers me the most is Jeep /Mopar do not care.
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Old 06-20-2017, 08:49 AM   #84
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As of today, My LJ is still trouble free.

It's a frustrating issue. What really bothers me the most is Jeep /Mopar do not care.
That's what bothers me the most, as well. My mechanic said the same thing. The guys at the dealer (where he got the PCM and had it flashed) told him that, too. It's not like this is a 1979 CJ. It's not that old in the grand scheme of things in a era where cars are built to go 200,000 miles.
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Old 07-12-2017, 09:56 AM   #85
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As of today, My LJ is still trouble free.

It's a frustrating issue. What really bothers me the most is Jeep /Mopar do not care.
Great news for you! All of my O2 sensor error codes recently came back and I cannot pass the emissions test in my state. I had the emissions test center check it for the past 2 days and they confirmed it is a bad PCM. They tested all the O2 sensors and they were clean. They were unaware of this Jeep PCM issue but they checked online and found many complaints, and told me to go through the dealership as there are many complaints new ones not working.

One other potentially correlated issue happened. My multifunctional switch no longer turns on the interior lights or dims the dashboard. This also happened years back and my fog lights world not turn off so my batter would always die. Once I fixed that all was good.

Weekend project will be to take the switch apart to clean it and reinstall. If it still doesn't work then I'll get a new switch before getting a new PCM to see if that helps out. If not I'll have to go the PCM route.

Has anyone entertained a class action lawsuit on this. My wife's car currently has a class action suit so calling the law firm that won that case could be an option.

https://www.law360.com/articles/8882...er-damage-suit
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Old 07-13-2017, 07:17 AM   #86
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Great news for you! All of my O2 sensor error codes recently came back and I cannot pass the emissions test in my state. I had the emissions test center check it for the past 2 days and they confirmed it is a bad PCM. They tested all the O2 sensors and they were clean. They were unaware of this Jeep PCM issue but they checked online and found many complaints, and told me to go through the dealership as there are many complaints new ones not working.

One other potentially correlated issue happened. My multifunctional switch no longer turns on the interior lights or dims the dashboard. This also happened years back and my fog lights world not turn off so my batter would always die. Once I fixed that all was good.

Weekend project will be to take the switch apart to clean it and reinstall. If it still doesn't work then I'll get a new switch before getting a new PCM to see if that helps out. If not I'll have to go the PCM route.

Has anyone entertained a class action lawsuit on this. My wife's car currently has a class action suit so calling the law firm that won that case could be an option.

https://www.law360.com/articles/8882...er-damage-suit

Lotsa Luck on getting any relief with a class action lawsuit on this. Evidently, Jeep has no idea what to do to fix this problem. If you think this is bad, do a little research with Toyota.They have rotting frames that is wide spread in certain models and they have ignored the issue.

Bottom line, if you have a working 2006 with an auto. Sell it while you can.
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Old 07-14-2017, 09:06 AM   #87
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Great news for you! All of my O2 sensor error codes recently came back and I cannot pass the emissions test in my state. I had the emissions test center check it for the past 2 days and they confirmed it is a bad PCM. They tested all the O2 sensors and they were clean. They were unaware of this Jeep PCM issue but they checked online and found many complaints, and told me to go through the dealership as there are many complaints new ones not working.

One other potentially correlated issue happened. My multifunctional switch no longer turns on the interior lights or dims the dashboard. This also happened years back and my fog lights world not turn off so my batter would always die. Once I fixed that all was good.

Weekend project will be to take the switch apart to clean it and reinstall. If it still doesn't work then I'll get a new switch before getting a new PCM to see if that helps out. If not I'll have to go the PCM route.

Has anyone entertained a class action lawsuit on this. My wife's car currently has a class action suit so calling the law firm that won that case could be an option.

https://www.law360.com/articles/8882...er-damage-suit

Lotsa Luck on getting any relief with a class action lawsuit on this. Evidently, Jeep has no idea what to do to fix this problem. If you think this is bad, do a little research with Toyota.They have rotting frames that is wide spread in certain models and they have ignored the issue.

Bottom line, if you have a working 2006 with an auto. Sell it while you can.
Mine is a 2005 with manual tranny with 88k miles.
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Old 07-21-2017, 07:28 AM   #88
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Well I'm new to this forum but I have been following this thread and my 2005 LJ started acting up with the same issues described. I have a friend who is an electrical engineer and has his own lab for rebuilding circuit breakers and he agreed to help me take my PCM apart and clean all the corrosion away. He said it happens a lot when electronics are exposed to the elements and with the location of this module under the hood it stands to reason. I'm not sure how long it will take but I'm sure it is a tedious task but what do I have to lose. We will have to wait for his next Saturday off to get to it but I will keep y'all posted and try to take pics of the process.
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Old 07-21-2017, 04:46 PM   #89
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Well I'm new to this forum but I have been following this thread and my 2005 LJ started acting up with the same issues described. I have a friend who is an electrical engineer and has his own lab for rebuilding circuit breakers and he agreed to help me take my PCM apart and clean all the corrosion away. He said it happens a lot when electronics are exposed to the elements and with the location of this module under the hood it stands to reason. I'm not sure how long it will take but I'm sure it is a tedious task but what do I have to lose. We will have to wait for his next Saturday off to get to it but I will keep y'all posted and try to take pics of the process.
Definitely interested!
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Old 07-22-2017, 08:32 AM   #90
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Well I'm new to this forum but I have been following this thread and my 2005 LJ started acting up with the same issues described. I have a friend who is an electrical engineer and has his own lab for rebuilding circuit breakers and he agreed to help me take my PCM apart and clean all the corrosion away. He said it happens a lot when electronics are exposed to the elements and with the location of this module under the hood it stands to reason. I'm not sure how long it will take but I'm sure it is a tedious task but what do I have to lose. We will have to wait for his next Saturday off to get to it but I will keep y'all posted and try to take pics of the process.
LOL this has already been tried.

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