C0135high severityChassis
Brake Rotor Temperature Excessive
on 2021 Audi A3 2.0L Turbo I4 · AWD
What this code means
The brake rotor temperature sensor or calculation indicates brake temperature exceeds safe limits.
Symptoms
- Brake fade warning
- Reduced braking performance
- Brake smell
- Brake warning light
- ABS intervention increased
Common causes
- Aggressive driving downhill
- Seized brake caliper
- Dragging brake pad
- Brake fluid boiling
- Undersized brakes for vehicle load
Diagnostic steps
- Check all four rotors for discoloration indicating overheating
- Inspect calipers for seized pistons or slides
- Check brake pad contact pattern
- Verify brake fluid boiling point with refractometer
- Check for dragging brakes by spinning wheels
Repair notes
Identify and correct the cause of overheating. Replace fluid if boiling point is low. Service seized calipers.
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