× 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

U0100 Diagnostic Trouble Code Discussion for June 2013

Lost Communication With ECM

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 U0100
Help Request Posted
2006 Mazda 6 S 3.0L No Start VIN: 1YVHP80D06
U0100: Communication Error To PCM. ... sitting on lot for 9 months. drove 30 miles and cut off. i have no comm to pcm. i have checked b+ and grounds at pcm. B+ at dlc. ohmed grounds at dlc. i see on flow chart for can wires it goes from bcm to pcm. if i unplugged bcm i get no codes. plug back i...
June 04, 2013