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Unfortunately getting to the part of the wiring harness that connects to the tranny is very difficult. I have thought about swapping out the harness but the guy at the tranny shop said if it were the wiring harness the car would have threw a code immediately. It took a while for my codes to...

Hi JC and everyone, I had the solenoid pack replaced and the issue is unchanged. The reputable tranny shop who worked at ford dealer in early 2000's thinks its thr PCM still. Even after I've had it repaired twice and replaced with one by Flagship 1. It wasn't cheap lol. Still trying to figure...

Just a quick update, after repairing PCM twice and getting a new PCM from Flagship 1 and replacing the solenoid pack, issue persists. The reputable tranny shop thinks its a chip in the PCM. He's getting voltage to the solenoids which means its not the harness.

Hi everyone, just thought I'd post back here for anyone viewing this thread in the future. The throttle body, tranny fluid, coils and solenoid pack are all good. Checked/ replaced. Big $$$. Didn't fix the issue :/

Thank you for this! Yes I know the solenoids on the 03 suck. It was just hard to beleive that they sucked this bad where I'd have to replace it twice. I greatly appreciate the input. I just made an appointment for the solenoid to be replaced this week. I'll post back here on the results

So there's no room whatsoever to remove the wiring harness from the tranny. If you plan on fixing the wiring yourself you will have to drop or lower the tranny. I called the best dealer near me and gave them the codes. They said that it is either the wiring or an electrical failure inside the...

I'll be working on it this weekend. Based on my conversations with my tranny shop and Flagship One, as well as my own research, we think it's either the wiring to the solenoid, or the solenoid pack itself. Thankfully I have the codes now but I'm still stunned by how long it took for them to show...

I'd like to add that the car is finally getting codes and an occasional "check transmission message". Still doing some research but I figured I'd put the codes here in case someone knows the answer already or if someone happens to need this forum in the future. P0963 and P0748 Thanks

Hi everyone, I'm getting a little desperate as I'm $2k into my issue with it only getting worse, so I am seriously considering selling the vehicle. I've looked at every transmission related forum on here and I cannot find anyone who solved this issue. Any discussion of this usually gets derailed...

Anything ever come of this?

I'm getting them as well. You have to keep clicking the back arrow for it to go away.

I appreciate the response and info. I have suspicion that it's the wiring harness, as I just had the tranny rebuilt 25k miles ago. I've had the ecu repaired and then replaced too each "fix" of the ecu makes the shifting act very different.

Anything ever come of this?

Hi everyone, I really appreciate all the feedback and info. I just want to clarify that I do not have any CEL. The car hasn't been in failsafe mode either. I only have a simple SCT scanner, not sure if those can even see transmission issues. I checked the tranny fluid and there was fluid when...

Thanks for the info The transmission was rebuilt just 40k miles ago by a pretty reputable shop. I heard about the 03's issue with the fluid and solenoids, but I had disregarded it because the transmission was rebuilt, so I had assumed the solenoids and fluid are new. I will get the solenoid...

Sorry for the late reply, but I hope this can help anybody who seems to have this persistent p0133/p0153 issue in the future. If you're buying Ford Motorcraft O2's, beware that Ford changed the part number for the 02's on this car and the new part number is not correct. I'd recommend avoiding...

Hi everyone, I'm hoping somebody can give me some tips on the next steps to take with my 03 LS. A few months ago, I had sent my PCM to SIA Electronics for repair because the car was shifting very hard 3-4th gear and sometimes reverse. It was a little over a 3 week wait. Anyways, upon my first...

Thanks, I put the ford motorcraft sensors in but thanks for the note. I'll give an update when I get this figured out.

I've got an 03 LS and for about a year now I've kept getting the code P0133, it goes away on its own sometimes but never fails to eventually come back. I have replaced all four O2 sensors and cleaned the fuel injectors, and the car runs fine... Anyone have any ideas what else this could be?

I only got the tune about 2,000 miles ago but no issues yet.