BMW DTC C1201 – Wheel Speed Sensor Front/Left Circuit Low
DTC C1201 meaning on BMW
DTC C1201 on a BMW indicates an issue with the front/left wheel speed sensor circuit registering a low voltage. The wheel speed sensor is responsible for monitoring the speed of the wheel and providing this information to the vehicle’s ABS system for proper operation.
BMW DTC C1201 symptoms
Symptoms of DTC C1201 on a BMW may include:
- ABS warning light illuminated on the dashboard
- ABS system may not function properly
- Loss of traction control
- Increased stopping distance during braking
BMW DTC C1201 causes
Common causes of DTC C1201 on a BMW include:
- Faulty front/left wheel speed sensor
- Corroded or damaged wiring/connectors in the sensor circuit
- Issues with the ABS control module
BMW DTC C1201 seriousness
The seriousness of DTC C1201 on a BMW lies in the compromised functionality of the ABS system and traction control. Driving with a faulty wheel speed sensor can affect the vehicle’s ability to maintain stability during braking and cornering, potentially leading to unsafe driving conditions.
How to diagnose DTC C1201 on BMW
To diagnose DTC C1201 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes from the ABS system
- Inspect the front/left wheel speed sensor and its wiring for any visible damage or corrosion
- Test the wheel speed sensor using a multimeter to check for proper voltage readings
- Check the ABS control module for any faults or malfunctions
How to fix DTC C1201 on BMW
To fix DTC C1201 on a BMW, you can try the following solutions:
- Replace the front/left wheel speed sensor if it is found to be faulty
- Repair or replace any damaged wiring or connectors in the sensor circuit
- If the issue persists, consider checking and potentially replacing the ABS control module
How to erase DTC C1201 on BMW
To erase DTC C1201 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ABS system. Once the issue has been addressed and fixed, clearing the fault codes will reset the system and turn off the warning light on the dashboard.
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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