C0111
Brake Apply Circuit Low
2002-2005 Audi A4 3.0L V6
Moderate SeverityChassisGeneric (SAE)
Description
Low signal in the brake apply circuit indicates the module does not see brake application.
Symptoms
- Cruise control inoperative
- Shift interlock stuck
- Brake lights may not illuminate
- ABS light on
Common Causes
- Brake switch stuck open
- Wiring short to ground
- Brake pedal not contacting switch
- Switch plunger broken
Diagnostic Steps
- Check if brake lights illuminate when pedal pressed
- Test switch continuity
- Inspect switch mounting and pedal contact
- Check wiring for shorts to ground
Repair Notes
Adjust or replace brake light switch. Check pedal bumper pad.
Related Codes
Other Chassis Codes
- C0021LF Wheel Speed Sensor Range/Performance
- C0022RF Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0025LF Wheel Speed Sensor Circuit Intermittent
- C0026RF Wheel Speed Sensor Circuit Intermittent
- C0027LR Wheel Speed Sensor Circuit Intermittent
- C0028RR Wheel Speed Sensor Circuit Intermittent
- C0035Left Front Wheel Speed Sensor Circuit
- C0036Left Front Wheel Speed Signal Erratic
C0111 on Other Vehicles
Common Questions
What does code C0111 mean on a 2002-2005 Audi A4?
C0111 stands for "Brake Apply Circuit Low". Low signal in the brake apply circuit indicates the module does not see brake application.
What are the symptoms of C0111 on a Audi A4?
Common symptoms of C0111 include: Cruise control inoperative, Shift interlock stuck, Brake lights may not illuminate, ABS light on.
What causes C0111 on a 2002-2005 Audi A4?
Common causes of C0111 include: Brake switch stuck open, Wiring short to ground, Brake pedal not contacting switch, Switch plunger broken.