Lost Communication With Yaw Rate Sensor Module
What it means
U0123 means the vehicle has lost communication with the yaw rate sensor module, which measures how the car is rotating and feeds the stability control system. Without it, electronic stability and traction control typically shut off and warning lights come on, though the engine runs normally. The usual cause is a wiring or connector fault, a power/ground problem, a bus fault, or a failed module.
Can I keep driving? The engine runs normally, but stability and traction control are likely disabled, so handling has less safety margin on slippery roads or in a slide — drive gently and fix it soon.
Real-world scan data
Appears alongside · share of U0123 scans
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Stability control (ESC), traction control, and often ABS warning lights on
- Stability and traction control disabled
- Yaw rate/stability module unresponsive when scanned
- No change in how the engine runs
Common causes
Most likely first
- Wiring or connector fault to the yaw rate sensor moduleLikely
- Poor power or ground to the moduleCommon
- CAN bus fault interrupting the moduleCommon
- Failed yaw rate sensor moduleLess often
How to diagnose & fix
Work through it in order
- Scan the ABS/stability module for related U-codes.
- Inspect the yaw rate sensor module connector and wiring.
- Check the module's power and ground.
- Confirm bus communication to the module.
- Repair the wiring or replace the module, clear codes, and retest.
FAQ
Quick answers
Is it safe to drive with U0123?+
Can I just clear U0123?+
Related codes
Read & clear U0123 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.