What does code U0172 mean?

Q: What does code U0172 mean?

Lost Communication With 'Restraints System Sensor C'. U0172 is a generic network communication code indicating that a control module has lost the data signal from the restraints system sensor designated as 'C'. The computer has detected that the expected periodic message from that sensor is missing on the vehicle's communication bus, which can disable or degrade the airbag and seatbelt restraint functions.

DTC codes / U01xx · Lost communication with a control module / U0172

U0172Lost Communication With 'Restraints System Sensor C'

U0172 is a generic network communication code indicating that a control module has lost the data signal from the restraints system sensor designated as 'C'. The computer has detected that the expected periodic message from that sensor is missing on the vehicle's communication bus, which can disable or degrade the airbag and seatbelt restraint functions.

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.