Control Module Communication Bus A Off
Communication bus A is not active.
Have this diagnosed before driving further
Informational only. Consult a qualified mechanic.
- Bus wiring open/short
- Faulty module pulling bus down
- Connector issue
Have the communication bus diagnosed and repaired.
What does U0073 mean?
The U0073 OBD-II diagnostic trouble code (DTC) indicates: control module communication bus a off. This is a high-severity network code that your vehicle's onboard diagnostics system triggers when communication bus a is not active. If your check engine light is on with this code, you should have the vehicle inspected immediately before driving further.
Use Your Service Book to log this diagnostic trouble code to your vehicle's service history, track repairs, and get maintenance reminders — all for free.
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