What does code U0174 mean?

Q: What does code U0174 mean?

Lost Communication With 'Restraints System Sensor E'. U0174 is a generic network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has lost contact with the restraints system sensor designated as 'E'. The computer detected that expected periodic messages from that specific sensor stopped arriving within the allotted time window, which triggers the warning and may disable or degrade the affected restraint function.

DTC codes / U01xx · Lost communication with a control module / U0174

U0174Lost Communication With 'Restraints System Sensor E'

U0174 is a generic network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has lost contact with the restraints system sensor designated as 'E'. The computer detected that expected periodic messages from that specific sensor stopped arriving within the allotted time window, which triggers the warning and may disable or degrade the affected restraint function.

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.