Error code
OBD2 U0172
OBD2U0172
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Lost Communication With 'Restraints System Sensor C'.
Severity
highDriving may be unsafe due to potential airbag system failure. It is recommended to have this issue addressed immediately.
Summary
U0172 indicates that there is no communication between the OBD-II system and the supplementary restraint system (SRS) sensor C, which is part of the airbag system.
Common Causes
- Faulty SRS sensor C
- Data bus issues or damage affecting SRS sensor C
Fixes
FAQ
What should I do if my car shows U0172?
It is important to have the issue diagnosed and repaired by a professional mechanic as soon as possible, since it involves critical safety systems.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- U0100Lost Communication With ECM/PCM A
- U0101Lost Communication with TCM
- U0102Lost Communication with Transfer Case Control Module
- U0103Lost Communication With Gear Shift Module
- U0104Lost Communication With Cruise Control Module
- U0105Lost Communication With Fuel Injector Control Module
- U0106Lost Communication With Glow Plug Control Module
- U0107Lost Communication With Throttle Actuator Control Module
- U0108Lost Communication With Alternative Fuel Control Module
- U0109Lost Communication With Fuel Pump Control Module
- U0110Lost Communication With Drive Motor Control Module
- U0111Lost Communication With Battery Energy Control Module 'A'