BMW DTC C1209 – Wheel Speed Sensor Rear/Right Circuit/Open
DTC C1209 meaning on BMW
DTC C1209 on a BMW indicates an issue with the Wheel Speed Sensor Rear/Right Circuit being open. This means that the sensor responsible for monitoring the speed of the right rear wheel is not sending any signal back to the vehicle’s electronic control module.
BMW DTC C1209 symptoms
Symptoms of DTC C1209 on a BMW may include:
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Loss of stability control
- Increased stopping distance during braking
BMW DTC C1209 causes
Common causes of DTC C1209 on a BMW include:
- Faulty wheel speed sensor
- Broken or damaged wiring in the sensor circuit
- Corrosion or poor connections in the sensor circuit
BMW DTC C1209 seriousness
DTC C1209 should be taken seriously as it can affect the proper functioning of the vehicle’s ABS and stability control systems. Driving with this fault may compromise safety, especially during emergency braking or in slippery road conditions.
How to diagnose DTC C1209 on BMW
To diagnose DTC C1209 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes from the vehicle’s ABS system
- Inspect the right rear wheel speed sensor for any visible damage or contamination
- Check the wiring and connectors associated with the sensor for any signs of wear or corrosion
- Perform a resistance test on the sensor to determine if it is within specifications
How to fix DTC C1209 on BMW
To fix DTC C1209 on a BMW, you can try the following:
- Replace the faulty wheel speed sensor with a new one
- Repair or replace any damaged wiring or connectors in the sensor circuit
- Clean any corrosion from the sensor connections and ensure a secure connection
- Clear the fault codes using a diagnostic scanner after the repair
How to erase DTC C1209 on BMW
To erase DTC C1209 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s electronic control module. Once the repair has been completed and the issue resolved, clearing the fault codes will reset the system and turn off the warning lights 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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