BMW DTC C123C – Right Front Wheel Speed Sensor – Signal Too High
DTC C123C meaning on BMW
DTC C123C on a BMW indicates that the right front wheel speed sensor is reporting a signal that is too high compared to the expected values. This can lead to issues with the vehicle’s stability control system and ABS functionality.
BMW DTC C123C symptoms
Symptoms of DTC C123C on a BMW may include:
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Unusual braking behavior, such as pulsation or loss of ABS assistance
BMW DTC C123C causes
The common causes of DTC C123C on a BMW are:
- Defective right front wheel speed sensor
- Corroded or damaged sensor wiring/connectors
- Issues with the ABS control module
BMW DTC C123C seriousness
DTC C123C should be taken seriously as it can affect the vehicle’s safety systems, such as ABS and traction control. Driving with this fault unresolved may compromise the vehicle’s stability and braking performance.
How to diagnose DTC C123C on BMW
To diagnose DTC C123C on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the right front wheel speed sensor and its wiring for any visible damage
- Test the sensor’s output signal using a multimeter
- Check the ABS control module for any faults or communication issues
How to fix DTC C123C on BMW
To fix DTC C123C on a BMW, you can try the following:
- Replace the right front wheel speed sensor if it is found to be faulty
- Repair or replace any damaged wiring or connectors related to the sensor
- If the issue persists, consider checking and potentially replacing the ABS control module
How to erase DTC C123C on BMW
To erase DTC C123C on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s system. Once the issue has been resolved and the codes cleared, the warning lights should no longer be illuminated.
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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