What does code U0134 mean?

DTC codes / U01xx · Lost communication with a control module / U0134

U0134Lost Communication with Restraints System Sensor (Side Sensor)

U0134 is a network communication fault indicating that a control module, typically the restraints control module, has lost the expected data signal from a side impact sensor on the vehicle's communication bus. The computer has detected that messages from that specific sensor have stopped arriving within the required time window, which sets the code and usually illuminates the airbag 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.