@Wranglerfix @thump365
Read all 24 pages.. thanks for everyone’s input and WranglerFix for a great solution.
Just want to make sure what’s going on with me is the same issue (I think so after reading all this).
I also have an 04 LJ, and twice now I have also gotten into a situation where it will not shift out of 1st gear. I just got this jeep (inherited it, hence the username) so I havent driven it much and don’t remember much “hard shifting”, but I also might have just been chalking that up to being a close to 20 year old Jeep and not thinking much of it. The “not shifting out of low gear” is obviously very noticeable though. CEL is on, but I don’t have a reader so don’t know the codes.
I saw the posts about unplugging the battery for 10 minutes, and if that solves the problem, it’s a 99% chance it’s the PCM. So I tired that, and there you have it… the CEL is gone and shifting fine now. That obviously leads me to believe the PCM is failing.
My question is this seems to be a problem with the 05-06 models, but I have an 04. I did see an early post on this tread from
@Wranglerfix that this also affects some late model 04s. If I send you my VIN can you tell if it’s a late model 04 and likely has an issue with the PCM?
@thump365 - did you end up solving this problem? And if so, was the solution a PCM from
@Wranglerfix ?