Lost Communication With TCM

Q: What does code U0101 mean?

Lost Communication With TCM: The vehicle has lost communication with the transmission control module. Transmission may enter limp mode.

Network Code · High

What does U0101 mean?

The vehicle has lost communication with the transmission control module. Transmission may enter limp mode.

System: Module Communication

U0101 is a network diagnostic trouble code indicating lost communication with tcm. This code is classified as high severity, which means: address soon — may cause further damage.

Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your vehicle.