What does code U0273 mean?

Q: What does code U0273 mean?

Lost Communication With Lighting Driver Control Module A. U0273 is a network communication code indicating that one or more control modules have lost contact with the Lighting Driver Control Module A over the vehicle's data bus. The computer sets this code when it expects regular messages from that lighting module but stops receiving them within the required time window.

DTC codes / U02xx · Lost communication with a control module / U0273

U0273Lost Communication With Lighting Driver Control Module A

U0273 is a network communication code indicating that one or more control modules have lost contact with the Lighting Driver Control Module A over the vehicle's data bus. The computer sets this code when it expects regular messages from that lighting module but stops receiving them within the required time window.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaLost communication with a control module

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.