Lost Communication With Steering Angle Sensor Module
What it means
U0126 means the vehicle has lost communication with the steering angle sensor — the module that tells stability and driver-assist systems where the wheels are pointed. The car still steers normally, but without this data the stability control, traction control, and lane-keeping systems typically shut off and light up warnings. Common causes are wiring or connector faults at the sensor, a missing calibration after service, or a failed sensor module.
Can I keep driving? Drivable — steering itself still works, but stability control, traction control, and lane-keeping systems that need steering-angle data will likely be disabled.
Common symptoms
What you'll notice
- ABS, traction control, and stability control (ESC) warning lights on
- Stability/traction control and lane-keep assist disabled
- Electric power steering warning or altered assist on some vehicles
- Steering angle reads as unavailable to the scan tool
Common causes
Most likely first
- Damaged or corroded CAN wiring/connector at the steering angle sensorLikely
- No power or ground to the steering angle sensor moduleCommon
- Sensor that needs recalibration after battery, alignment, or clockspring serviceCommon
- Internally failed steering angle sensor moduleLess often
How to diagnose & fix
Work through it in order
- Scan all modules to confirm the steering angle sensor is missing and check for related bus codes.
- Inspect the sensor's connector and CAN wiring (often at the clockspring/steering column) for damage and corrosion.
- Check power and ground to the module.
- Perform the steering-angle sensor calibration procedure — many faults clear after a proper relearn.
- If it still doesn't communicate, replace the sensor module and recalibrate, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with U0126?+
Can I just clear U0126?+
Related codes
Often seen with U0126
Read & clear U0126 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.