× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

U0101 Diagnostic Trouble Code Discussion for April 2021

Lost Communication With TCM

Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC U0101
Help Request Posted
2006 Chevrolet Cobalt LS 2.2L No Communication VIN: 1G1AK15F76
U0101: TCM Non Communication- Initial Trouble Code. initial diagnosis-not shifting properly-flaring & skipping gears- no comm with TCM, PCM code U101, On install of new GM TCM & program attempt (with battery charger attached under hood B & top of shock tower)- got sparks from a different bolt at...
April 29, 2021