C0112moderate severityChassis
Brake Apply Circuit High
on 2012 Porsche 718 Boxster 2.7L H6 · RWD
What this code means
High signal in the brake apply circuit indicates constant brake application detected.
Symptoms
- Cruise control disengages immediately
- Brake lights always on
- ABS light on
- Shift interlock always released
Common causes
- Brake switch stuck closed
- Wiring shorted to voltage
- Switch plunger stuck
- Pedal not fully returning
Diagnostic steps
- Check if brake lights stay on with pedal released
- Test switch at rest and applied positions
- Inspect switch mounting
- Check pedal return spring
- Look for wiring shorts to voltage
Repair notes
Replace brake switch. Check pedal return mechanism.
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