BMW DTC C123F – Left Front Wheel Speed Sensor Phase Length Implausible
DTC C123F meaning on BMW
DTC C123F on a BMW refers to the fault code for the “Left Front Wheel Speed Sensor Phase Length Implausible.” This means that the vehicle’s onboard computer has detected an issue with the signal coming from the left front wheel speed sensor, indicating that the phase length of the sensor’s signal is not within the expected range.
BMW DTC C123F symptoms
Symptoms of DTC C123F 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 C123F causes
Common causes of DTC C123F on a BMW include:
- Faulty left front wheel speed sensor
- Damaged or corroded sensor wiring or connectors
- Interference from other electronic components
- Faulty ABS control module
BMW DTC C123F seriousness
The seriousness of DTC C123F 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 C123F on BMW
To diagnose DTC C123F on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer.
- Inspect the left 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 left front wheel speed sensor using a multimeter to check for proper resistance and signal output.
How to fix DTC C123F on BMW
To fix DTC C123F on a BMW, you can try the following solutions:
- Replace the left front wheel speed sensor if it is found to be faulty.
- Repair or replace any damaged wiring or connectors associated with the sensor.
- Clean any corrosion from the sensor connections and ensure a secure connection.
- If the issue persists, consider seeking professional help to diagnose and repair the ABS control module or other related components.
How to erase DTC C123F on BMW
To erase DTC C123F on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. After addressing the underlying issue causing the fault code, clearing the code 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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