BMW DTC C120D – Right Front Wheel Speed Sensor Drive Off Recognition
DTC C120D meaning on BMW
DTC C120D on a BMW refers to the Right Front Wheel Speed Sensor Drive Off Recognition fault. This diagnostic trouble code indicates that the vehicle’s onboard computer has detected an issue with the right front wheel speed sensor system, specifically related to the drive-off recognition function.
BMW DTC C120D symptoms
Symptoms of DTC C120D on a BMW may include:
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Loss of stability control
- Decreased braking performance
BMW DTC C120D causes
Common causes of DTC C120D on a BMW include:
- Failed or malfunctioning right front wheel speed sensor
- Wiring or connection issues in the sensor circuit
- Corrosion or debris affecting the sensor’s operation
- Faulty ABS control module
BMW DTC C120D seriousness
The seriousness of DTC C120D on a BMW lies in the compromised safety systems of the vehicle. Issues with the wheel speed sensor can affect the proper functioning of the ABS, traction control, and stability control systems, potentially leading to unsafe driving conditions and reduced vehicle control.
How to diagnose DTC C120D on BMW
To diagnose DTC C120D on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer.
- Inspect the right front wheel speed sensor and its wiring for any visible damage or corrosion.
- Perform a visual inspection of the ABS control module and related components.
- Test the right front wheel speed sensor using a multimeter to check for proper resistance and signal output.
How to fix DTC C120D on BMW
To fix DTC C120D on a BMW, consider the following solutions:
- Replace the right front wheel speed sensor if it is found to be faulty.
- Repair any damaged wiring or connections in the sensor circuit.
- Clean the sensor and its mounting area to ensure proper operation.
- If necessary, replace the ABS control module to address any internal faults.
How to erase DTC C120D on BMW
To erase DTC C120D on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. After performing the necessary repairs and ensuring the issue has been resolved, use the scanner to reset the system and erase the fault code.
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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