P05DD

Symptoms

• The Check Engine light is on; ABS, ESP, AEB warnings are possible
• Disabled or incorrect operation of adaptive cruise control
• Problems with enabling regenerative braking on hybrids
• Inability to start the engine (if the brake is required)
• Unstable operation of the automatic slope hold system

Causes

• Short circuit of the signal wire of sensor B to the vehicle body
• Break in the sensor reference voltage supply wire
• Corrosion or damage to the sensor connector in the pedal unit area
• Moisture getting under the pedal unit casing
• Internal defect of brake pedal position sensor B

How to Fix

1. Read all fault codes and pay attention to ABS/ESP/transmission codes
2. Inspect the pedal block area for moisture, corrosion, and mechanical damage to the harness.
3. Check the voltage on the signal wire of sensor B with the pedal released and pressed.
4. Disconnect sensor connector B: if the signal rises, there is a short circuit inside the sensor; if not, there is a short in the wiring
5. Check the sensor reference voltage supply wire for an open circuit.
6. Repair short or replace brake pedal position sensor B

Related codes

Error P05DD by Vehicle Brand