What does code U0257 mean?

DTC codes / U02xx · Lost communication with a control module / U0257

U0257Lost Communication With Front Controls/Display Interface Module

U0257 is a network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has stopped receiving messages from the Front Controls/Display Interface Module, which typically handles climate, radio, and other front-panel inputs. The detecting module sets this code after repeated failed attempts to hear from that interface over the data bus, not because the interface itself has necessarily failed internally.

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.