BMW DTC C1066 – Brake Pedal Position Sensor Electrical or Sensor Defective
DTC C1066 meaning on BMW
DTC C1066 on a BMW indicates an issue with the Brake Pedal Position Sensor, specifically an electrical fault or a defective sensor. The Brake Pedal Position Sensor is responsible for detecting the position of the brake pedal and transmitting this information to the vehicle’s electronic control unit (ECU).
BMW DTC C1066 symptoms
Symptoms of DTC C1066 on a BMW may include:
- Malfunction indicator light (MIL) illuminated on the dashboard
- Brake warning light on the instrument cluster
- Loss of brake pedal position information
- Inconsistent brake pedal feel
BMW DTC C1066 causes
The common causes of DTC C1066 on a BMW are:
- Electrical wiring issues
- Faulty Brake Pedal Position Sensor
- Corrosion or poor connections in the sensor circuit
BMW DTC C1066 seriousness
DTC C1066 should be taken seriously as it directly affects the proper operation of the brake system. Ignoring this fault can compromise the safety and performance of the vehicle, potentially leading to brake-related issues.
How to diagnose DTC C1066 on BMW
To diagnose DTC C1066 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECU
- Inspect the wiring harness and connectors for any visible damage or corrosion
- Test the Brake Pedal Position Sensor using a multimeter to check for proper voltage and resistance
- Perform a visual inspection of the brake pedal assembly for any physical damage
How to fix DTC C1066 on BMW
To fix DTC C1066 on a BMW, the following steps may be taken:
- Repair or replace any damaged wiring or connectors in the sensor circuit
- Replace the faulty Brake Pedal Position Sensor with a new one
- Clean any corrosion from the sensor circuit and ensure proper connections
- Clear the fault codes from the ECU memory after the repair is completed
How to erase DTC C1066 on BMW
To erase DTC C1066 on a BMW, follow these steps:
- Use a diagnostic scanner to access the ECU and navigate to the fault code menu
- Select the option to clear the fault codes stored in the ECU memory
- Confirm the action and wait for the scanner to complete the process
- Verify that the DTC C1066 has been successfully erased by checking for any remaining fault codes
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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