What does code U017B mean?

Q: What does code U017B mean?

Lost Communication With Restraints System Sensor L. U017B 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 'L'. The module that sets this code has detected that the expected periodic messages from that sensor 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 / U017B

U017BLost Communication With Restraints System Sensor L

U017B 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 'L'. The module that sets this code has detected that the expected periodic messages from that sensor 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 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.