What does code U0234 mean?

Q: What does code U0234 mean?

Lost Communication With Convenience Recall Module. U0234 is a network communication code indicating that a primary control module, usually the body control module (BCM), has lost the expected controller area network (CAN) messages from the convenience recall module. The module that sets this code has detected a complete absence of valid data frames from the convenience recall module for a calibrated time period, not merely a single missed message.

DTC codes / U02xx · Lost communication with a control module / U0234

U0234Lost Communication With Convenience Recall Module

U0234 is a network communication code indicating that a primary control module, usually the body control module (BCM), has lost the expected controller area network (CAN) messages from the convenience recall module. The module that sets this code has detected a complete absence of valid data frames from the convenience recall module for a calibrated time period, not merely a single missed message.

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.