Chassis
generic / SAE
C0021
ABS Pump Motor Circuit Range/Performance
The pump motor responds, but its current draw or run time is outside the expected range. The control module suspects mechanical wear or hydraulic blockage.
SystemChassis
Typegeneric / SAE
GroupC0
Range / number– / 21
Possible causes
- Pump worn, low delivery high
- Hydraulic block contaminated with brake fluid debris medium
- Sensor element aged beyond calibration window low
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–1600 €
- Estimated time: 2–5 h
- Component: abs pump motor
- Component: abs hydraulic block
- Component: abs control module
Sources
References
sae:J2012