What does code U0278 mean?

Q: What does code U0278 mean?

Lost Communication With Seat Control Module L. U0278 is a network communication code indicating that the primary control module has lost the expected data messages from the seat control module on the left side of the vehicle. The computer detects this when the module stops responding on the controller area network (CAN) bus for a calibrated period, often because of a wiring fault, a failed module, or a power supply issue.

DTC codes / U02xx · Lost communication with a control module / U0278

U0278Lost Communication With Seat Control Module L

U0278 is a network communication code indicating that the primary control module has lost the expected data messages from the seat control module on the left side of the vehicle. The computer detects this when the module stops responding on the controller area network (CAN) bus for a calibrated period, often because of a wiring fault, a failed module, or a power supply issue.

SystemNetwork

Code typeGeneric (all makes)

SeverityLow

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.