The ABS computer sees a missing or wrong signal from the left front wheel. The driver may see the ABS and traction lights on.
Likely causes, most common first
- Dirty or faulty wheel speed sensor
- Damaged wiring near the wheel
- Damaged tone ring or wheel bearing
- Corroded connector
Parts usually involved
- Wheel speed sensor
- Tone ring
- Wheel bearing
- Sensor connector
Test before you replace
Compare all four wheel speeds live on a road test, then inspect the sensor, wiring and tone ring on that wheel.
Chassis codes can mean different things on different makes. Confirm this one in the maker's data for your car.
General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.