Chassis
generic / SAE
C05A4
Wheel Speed Sensors Supply Circuit Low
Wheel speed sensors supply voltage below expected range. Wheel-speed signals feed ABS, ESC, traction control, transmission and odometer — a single dropped signal disables all of these safety functions until repaired.
SystemChassis
Typegeneric / SAE
GroupC0
Range / number5 / A4
Possible causes
- Supply shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation 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: 50–600 €
- Estimated time: 0.5–3 h
- Component: wss supply
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012