What does code U0129 mean?

Lost Communication With Brake System Control Module: Communication with the brake system control module has been lost.

U0129 is rated as critical severity. Stop driving — risk of damage or safety hazard.

U0129

Lost Communication With Brake System Control Module

Network Code · Critical

What does U0129 mean?

Communication with the brake system control module has been lost.

System: Module Communication

U0129 is a network diagnostic trouble code indicating lost communication with brake system control module. This code is classified as critical severity, which means: stop driving — risk of damage or safety hazard.

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.