What does code U0073 mean?

Control Module Communication Bus Off: A control module communication bus is completely off — no communication possible.

U0073 is rated as critical severity. Stop driving — risk of damage or safety hazard.

U0073

Control Module Communication Bus Off

Network Code · Critical

What does U0073 mean?

A control module communication bus is completely off — no communication possible.

System: CAN Bus

U0073 is a network diagnostic trouble code indicating control module communication bus off. 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.