C0058high severityChassis
ABS Rear Outlet Valve Solenoid Circuit
on 2021 Audi A6 2.0L Turbo I4 · AWD
What this code means
Malfunction in the rear ABS outlet valve solenoid circuit.
Symptoms
- ABS light on
- Rear brakes lock during ABS activation
- Poor rear brake modulation
Common causes
- Outlet valve solenoid failure
- Internal modulator fault
- Brake fluid contamination
Diagnostic steps
- Test solenoid resistance
- Command valve activation
- Check brake fluid
- Inspect connector and wiring
Repair notes
Replace ABS hydraulic modulator. Flush brake system.
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