C0063high severityChassis
ABS Pump Motor Circuit Open
on 2021 Audi A4 2.0L I4 TFSI · AWD
What this code means
Open circuit detected in the ABS pump motor wiring or motor winding.
Symptoms
- ABS light on
- ABS pump does not run at all
- Complete ABS failure
- Hard brake pedal during ABS demand
Common causes
- Broken wire to pump motor
- Pump motor winding open
- Blown pump motor fuse
- Corroded connector
Diagnostic steps
- Check pump motor fuse
- Test continuity of pump motor circuit
- Inspect pump motor connector
- Test motor winding resistance
Repair notes
Repair open circuit or replace ABS pump motor assembly.
Other Chassis codes on this vehicle
C0021
LF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
C0023
LR Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0025
LF Wheel Speed Sensor Circuit Intermittent
C0026
RF Wheel Speed Sensor Circuit Intermittent
C0027
LR Wheel Speed Sensor Circuit Intermittent
C0028
RR Wheel Speed Sensor Circuit Intermittent
C0035
Left Front Wheel Speed Sensor Circuit
C0036
Left Front Wheel Speed Signal Erratic