Wheel Speed Sensor Signal Erratic
The ABS control module has detected an erratic wheel speed sensor signal — sudden jumps or dropouts compared to the other wheels. Typical causes are a damaged tone ring or a loose sensor.
Affected components
- Wheel speed sensor
- Tone ring
- Abs control module
Common causes
- High likelihood: Tone ring damaged or contaminated with metal debris
- Medium likelihood: Wheel speed sensor loose in housing
- Low likelihood: Excessive hub bearing play
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.