BMW DTC C1241 – Left Rear Wheel Speed Sensor Phase Length Implausible
DTC C1241 meaning on BMW
DTC C1241 on a BMW indicates an issue with the Left Rear Wheel Speed Sensor Phase Length being implausible. This means that the vehicle’s onboard computer has detected a discrepancy in the phase length signal from the left rear wheel speed sensor, which is crucial for the proper functioning of the vehicle’s stability control system.
BMW DTC C1241 symptoms
Symptoms of DTC C1241 on a BMW may include:
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Stability control system intervention or failure
- Irregular braking behavior
BMW DTC C1241 causes
The common causes of DTC C1241 on a BMW include:
- Faulty left rear wheel speed sensor
- Wiring or connection issues in the sensor circuit
- Corrosion or dirt affecting the sensor’s performance
- Electronic control unit (ECU) malfunction
BMW DTC C1241 seriousness
DTC C1241 should be taken seriously as it can affect the vehicle’s stability and safety systems. Driving with this fault unresolved may compromise the effectiveness of the ABS, traction control, and stability control systems, potentially leading to unsafe driving conditions.
How to diagnose DTC C1241 on BMW
To diagnose DTC C1241 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes from the vehicle’s ECU.
- Inspect the left rear wheel speed sensor and its wiring for any visible damage or corrosion.
- Perform a visual inspection of the sensor’s tone ring and ensure it is clean and undamaged.
- Test the sensor’s output signal using a multimeter to check for proper functionality.
How to fix DTC C1241 on BMW
To fix DTC C1241 on a BMW, consider the following steps:
- Replace the left rear wheel speed sensor if it is found to be faulty.
- Repair any damaged wiring or connections in the sensor circuit.
- Clean the sensor and tone ring to ensure proper operation.
- If the issue persists, consult a professional mechanic for further diagnosis and repair.
How to erase DTC C1241 on BMW
To erase DTC C1241 on a BMW, you can:
- Use a diagnostic scanner to clear the fault codes stored in the ECU.
- After making the necessary repairs, reset the system by disconnecting the vehicle’s battery for a few minutes.
- Reconnect the battery and start the vehicle to see if the fault code has been successfully erased.
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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