OBD-II code · Network
U0123 Lost Communication with Yaw Rate Sensor Module
The Yaw Rate Sensor Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. Stability control loses its yaw input and typically disables ESC. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
Is it safe to drive with U0123?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyYaw rate sensor unpowered
- PossibleCAN wiring to yaw rate sensor broken
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Yaw Rate Sensor, Can Bus Wiring
Related codes
- U0133Lost Communication with Yaw Rate Sensor Module
- U0120Lost Communication with Starter/Generator Control Module
- U0121Lost Communication with ABS Control Module
- U0122Lost Communication with Vehicle Dynamics Control Module
- U0124Lost Communication with Lateral Acceleration Sensor Module
- U0125Lost Communication with Multi-axis Acceleration Sensor
- U0126Lost Communication with Steering Angle Sensor Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.