C0140high severityChassis
Electronic Brake Force Distribution Malfunction
on 2013 Audi A6 3.0L Supercharged V6 · AWD
What this code means
The EBD system that proportions brake force between front and rear has detected a fault.
Symptoms
- ABS light on
- Brake warning light on
- Rear wheels may lock under hard braking
- Vehicle pulls to one side during braking
Common causes
- ABS sensor mismatch between front and rear
- ABS modulator valve fault
- Uneven brake pad wear front to rear
- Brake pressure imbalance
Diagnostic steps
- Compare all four wheel speed sensor readings during braking
- Check brake pad wear at all four corners
- Inspect ABS modulator valve codes
- Test brake pressure distribution
- Verify tire sizes match
Repair notes
{"Diagnose underlying ABS or mechanical brake issue. EBD relies on ABS components to function."}
Other Chassis codes on this vehicle
C0021
LF Wheel Speed Sensor Range/Performance
C0021
LF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
C0023
LR Wheel Speed Sensor Range/Performance
C0023
LR Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0025
LF Wheel Speed Sensor Circuit Intermittent
C0025
LF Wheel Speed Sensor Circuit Intermittent