Chassis (C)
C1201: ABS wheel speed signal issue
This code indicates a problem with the wheel speed signal, which can affect the performance of the ABS and traction control systems.
Checked by a licensed car technician · last reviewed 29 September 2026
Symptoms
- ABS warning light on
- Traction control light on
- ABS not functioning
- Traction control not functioning
Common causes
- Damaged sensor harness
- Dirty tone ring
- Hub bearing wear
How to check it yourself
- Inspect wheel-speed sensor wiring
- Check for dirt or damage on the tone ring
- Inspect hub bearing for wear
Can I keep driving?
The car can still be driven, but ABS and traction control may not work properly.
General guidance, not a professional inspection. Confirm faults with measurements before buying parts, and use a qualified mechanic for brakes, steering, fuel leaks, airbags, and other safety-critical work. Terms and disclaimer