Chassis
generic / SAE
C05A8
ABS Pump Motor Supply Voltage B Circuit Range/Performance
ABS pump motor supply B drifts or fluctuates. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemChassis
Typegeneric / SAE
GroupC0
Range / number5 / A8
Possible causes
- Connector with high resistance high
- Sensor element aged beyond calibration window low
- Sensor mounting loose - signal damping 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: 30–400 €
- Estimated time: 0.5–2 h
- Component: abs pump supply b
- MIL / check engine light
Sources
References
sae:J2012