Loss of Speed Sensor Signal Front Left
The ABS control module has lost the wheel speed signal from the front left wheel during driving. ABS and stability control are disabled because wheel-individual speed information is required for slip detection.
Affected components
- Wheel speed sensor
- Tone ring
- Abs control module
- Sensor wiring
Common causes
- High likelihood: Wheel speed sensor failed
- Medium likelihood: Wiring break at wheel arch
- Low likelihood: Tone ring damaged
Possible symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.