C0024moderate severityChassis
RR Wheel Speed Sensor Range/Performance
on 2009 Audi Q7 4.2L V8 · AWD
What this code means
The right rear wheel speed sensor output is outside expected parameters for current speed.
Symptoms
- ABS light on
- Rear traction control malfunction
- Stability control light
Common causes
- Metallic debris on sensor
- Tone ring damage
- Sensor internal failure
- Axle bearing play
Diagnostic steps
- Compare rear wheel speeds at constant speed
- Clean sensor face and tone ring
- Measure tone ring runout
- Test sensor resistance and output
- Check axle bearing
Repair notes
Clean or replace sensor. Inspect tone ring and axle bearing.
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
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
C0040
Right Front Wheel Speed Sensor Circuit