What does code U0276 mean?

Q: What does code U0276 mean?

Lost Communication With Lighting Driver Control Module D. U0276 is a communication fault indicating that the primary control module has lost contact with Lighting Driver Control Module D over the vehicle's Controller Area Network (CAN) data bus. The computer detects this when expected periodic messages from that lighting module stop arriving within a defined timeout window, setting the code and often illuminating the warning light.

DTC codes / U02xx · Lost communication with a control module / U0276

U0276Lost Communication With Lighting Driver Control Module D

U0276 is a communication fault indicating that the primary control module has lost contact with Lighting Driver Control Module D over the vehicle's Controller Area Network (CAN) data bus. The computer detects this when expected periodic messages from that lighting module stop arriving within a defined timeout window, setting the code and often illuminating the warning light.

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.