Dec 28, 2010 · Re: Check Engine Code U0100 Laura, I am having issues with my 2006 DTS giving off the U0100 code and may need some assistance with my dealer in getting resolution …

Feb 13, 2021 · This code U0100 popped up last week when I started the truck, but it drove fine. I do have an unlocked pcm with a Hemifever tune. Couple weeks ago i installed a new tune for …

Jun 21, 2024 · Hi Everyone, I have been chasing my tail for some time now and am hoping someone could shed some light on my issue. I have been searching through the forum with no …

Oct 6, 2016 · Car is Dead - Cannot Connect to ECM - U0100 - help? Jump to Latest 40K views 27 replies 10 participants last post by payne Feb 15, 2018

Dec 9, 2025 · 2007 Escalade Having Communication Issues Vehicle Still Runs And Drives ! locks going on and off Gauges going crazy Slow acceleration Hesitant shifting ABS Light CEL Light …

Feb 2, 2019 · The truck never went into eco mode so I took it back home. I read the code and it was U0100. Letting the truck off for 3 hours the code is still there. Any of you had this issue? …

May 8, 2023 · The only code I got was U0100 which means no communication with ECM. Battery was fully charged during all of this and had the same results over many attempts. Eventually I …

Jul 28, 2015 · Hi fellow owners, I have a 2009 CTS with DI V6. My wife and I went to go shoping. The car stated fine. Then gave a few chugs and shut down. The engine will not start or even …

Mar 1, 2025 · Hi everybody. I hope someone can help me. 2007 Cadillac SRX AWD 3.6 Just changed the ABS module and now no start - no crank. I put the code reader on the OBD and it …

Feb 16, 2025 · U0121 U0100 U11BC U1110 U0140 - this one, for the BCM, truck has had it for years, since being repaired after an accident, never poses a check engine or anyt issue, and …