C0100moderate severityChassis
Brake Pedal Position Sensor Circuit
on 2005 Hyundai Tucson 2.0L I4 · AWD
What this code means
General malfunction in the brake pedal position sensor, which provides analog brake apply data to the ABS/stability module.
Symptoms
- ABS warning light
- Stability control disabled
- Regenerative braking fault on hybrids
- Brake assist may not activate
Common causes
- Faulty brake pedal position sensor
- Sensor wiring damage
- Connector corrosion at sensor
- ABS module input failure
Diagnostic steps
- Read brake pedal position with scan tool while pressing pedal
- Check for smooth, proportional signal
- Inspect sensor wiring and connector
- Test sensor supply voltage
- Check for related brake switch codes
Repair notes
Replace brake pedal position sensor. Verify smooth signal across full pedal travel.
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