Chassis
generic / SAE
C0235
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.
SystemChassis
Typegeneric / SAE
GroupC0
Range / number2 / 35
Possible causes
- Tone ring damaged or contaminated with metal debris high
- Wheel speed sensor loose in housing medium
- Excessive hub bearing play low
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–500 €
- Estimated time: 0.5–3 h
- Component: wheel speed sensor
- Component: tone ring
- Component: abs control module
Sources
References
sae:J2012