Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Are you getting any other symptoms? When the U0101 is set it usually throws the transmission into limp mode. Is yours shifting like normal or does it seem to be in limp mode?
Clear the code and see if it only returns with an ignition key cycle. Inspect the wiring to the transmission connector for backed out wires or poor connections.If so, verify the transmission is getting 12 volts key on power on the Pink wire as soon as the key is turned on. Also check for 12 volts on the Dark Blue wire from the Body Control Module (BCM).If OK, reprogram the Electronic Brake Control Module (EBCM) and retest. If the TCM has good voltage then it sounds like the EBCM is not communicating correctly.
The transmission hasn't been replaced recently right?
That's odd. Might be related, might not. If the only trouble codes you are getting are the u0101 and p0057 I would say the starter issue is probably not related.
I would make sure both the TCM and EBCM have the latest reflash. The code is designated for a EBCM communication problem, but the TCM programming will set this code as well.
Sorry, one of my techs pulled me out in the shop for a question.
You should be able to reflash with a tech 2 if it has the latest updates.
Then I would start questioning whether there is an internal short in the EBCM or a problem in the TCM/transmission. It's hard to speculate a mechanical problem when all you have is a couple of communication codes though.
The tech should know. Here at my shop we pay a monthly subscription and the scan tool tells us when it's up to date.
I'm leaving the shop for the day. I'll check back in later to see if you need more info.
The reflash didn't do anything on other vehicles or on yours? If a reflash was performed on a vehicle with a bad transmission it wouldn't do anything, but that vehicle would likely have had additional trouble codes, p0700 p0720 p0730 or similar. It doesn't seem - from looking at your trouble codes- that you have a mechanical problem in your transmission. It seems like a programming issue. It could still have mechanical faults, but you can't be sure until the communication issues are narrowed out.
Hi, do you still need help with this?
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