× 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

U1301 Diagnostic Trouble Code Discussion for January 2013

Class 2 Data Line Short To Voltage

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 U1301
Help Request Posted
2008 Chevrolet Trailblazer LT 4.2L Stall VIN: 1GNDT13S28
U1301: Class 2 communication circuit low voltage. I need some help here, this trailblazer was towed in with a start, then stall issue. When it showed up, it was a no start, no ground from the ecm to the starter relay. Replaced the ecm, sent it to dealer for flashing, came back with a start, then stall after a...
January 07, 2013