Error code
OBD2 U0177
OBD2U0177
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Lost Communication With 'Restraints System Sensor H'.
Severity
highCan drive, but safety systems may be compromised.
Summary
U0177 indicates that the car's computer has lost communication with the supplementary restraint system (SRS) sensor H, which is part of the airbag system.
Symptoms
- Airbags or seatbelt pretensioners may not work properly
- Dashboard warning lights for SRS issues
Common Causes
- Faulty SRS sensor H
- Data bus communication failure between SRS components
- Power supply issue to SRS sensor H
Fixes
FAQ
What does U0177 mean?
U0177 means the car's computer has lost communication with an SRS sensor, which is critical for airbag and seatbelt functionality.
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'