What does code U0238 mean?

Q: What does code U0238 mean?

Lost Communication With Digital Audio Control Module D. U0238 is a network communication fault indicating that a control module on the vehicle's data bus has stopped receiving messages from the Digital Audio Control Module D, which is one of the audio system's dedicated control units. The computer that set this code detected a loss of the periodic heartbeat signal from that module, meaning the audio control module is either offline, unpowered, or unable to communicate over the bus.

DTC codes / U02xx · Lost communication with a control module / U0238

U0238Lost Communication With Digital Audio Control Module D

U0238 is a network communication fault indicating that a control module on the vehicle's data bus has stopped receiving messages from the Digital Audio Control Module D, which is one of the audio system's dedicated control units. The computer that set this code detected a loss of the periodic heartbeat signal from that module, meaning the audio control module is either offline, unpowered, or unable to communicate over the bus.

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.