What does code U0179 mean?

Q: What does code U0179 mean?

Lost Communication With 'Restraints System Sensor J'. U0179 is a generic network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has lost contact with a specific restraints system sensor designated as 'J'. The module that sets this code has detected that the expected periodic messages from sensor J have stopped arriving within the required time window, which points to a break in the communication path rather than a direct crash sensor fault.

DTC codes / U01xx · Lost communication with a control module / U0179

U0179Lost Communication With 'Restraints System Sensor J'

U0179 is a generic network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has lost contact with a specific restraints system sensor designated as 'J'. The module that sets this code has detected that the expected periodic messages from sensor J have stopped arriving within the required time window, which points to a break in the communication path rather than a direct crash sensor fault.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.