BMW DTC C1237 – Left Rear Wheel Speed Sensor Signal Implausible
DTC C1237 meaning on BMW
DTC C1237 on a BMW indicates that there is an issue with the left rear wheel speed sensor signal. The control module has detected that the signal from the left rear wheel speed sensor is implausible or out of range, which can affect the proper functioning of the vehicle’s stability control system.
BMW DTC C1237 symptoms
Symptoms of DTC C1237 on a BMW may include:
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Stability control system not functioning properly
- Increased stopping distance during braking
BMW DTC C1237 causes
The common causes of DTC C1237 on a BMW include:
- Faulty left rear wheel speed sensor
- Damaged or corroded wiring/connectors related to the left rear wheel speed sensor
- Issues with the wheel bearing or hub assembly
- Faulty control module
BMW DTC C1237 seriousness
DTC C1237 should be taken seriously as it can affect the vehicle’s stability and safety systems. Driving with a malfunctioning wheel speed sensor can compromise the effectiveness of the ABS, traction control, and stability control systems, potentially leading to unsafe driving conditions.
How to diagnose DTC C1237 on BMW
To diagnose DTC C1237 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s control module.
- Inspect the left rear wheel speed sensor and its wiring for any visible damage or corrosion.
- Test the resistance of the wheel speed sensor using a multimeter to check for proper functionality.
- Check the wheel bearing and hub assembly for any signs of wear or damage.
- If necessary, perform a road test to verify the symptoms and confirm the DTC.
How to fix DTC C1237 on BMW
To fix DTC C1237 on a BMW, you can try the following solutions:
- Replace the left rear wheel speed sensor if it is found to be faulty.
- Repair or replace any damaged wiring or connectors related to the wheel speed sensor.
- Inspect and replace the wheel bearing or hub assembly if necessary.
- If the control module is faulty, it may need to be reprogrammed or replaced.
How to erase DTC C1237 on BMW
To erase DTC C1237 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the control module. After performing the necessary repairs and ensuring that the issue has been resolved, you can reset the fault codes to 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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