May 7, 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 jumped the …

Dec 28, 2010 · Re: Check Engine Code U0100 Hello Restomod, Welcome to the forum! I am sorry to hear of the vehicle issue you've encountered. If you would like my assistance throughout the process …

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 luck as of yet. I …

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 my long …

Jul 31, 2018 · Iam getting the code u0100 says ecm/pcm has no communication customer states the car just shut off.well to start off if keeps getting rained in becaues the sunroof leaks fixed that today.ok …

Oct 5, 2016 · Out of the blue, my mildly modded CTS-V did not start earlier this week. I borrowed a Tech2 today and am getting the following codes: U0100 Lost communication with ECM U0121 Lost …

Sep 28, 2022 · 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? Truck is a …

Jun 16, 2024 · BEWARE OF SCAMMERS. Anyone trying to get your money should be checked out BEFORE you send anything anywhere. Anti theft issue 2005 SRX 3.6 (Update new DTC: U0100 Lost …

Oct 12, 2015 · U0100 - TCM Lost Comm with ECM this and every ignition cycle. This is the first time I've had to hook the Tech II up to the V and I found out my software isn't up to date for the 07 Cadillac …