BMW DTC C0504 – Left Front Wheel Speed Sensor Intermittent/Erratic
DTC C0504 meaning on BMW
DTC C0504 on a BMW indicates an intermittent or erratic signal from the left front wheel speed sensor. This fault code is typically triggered when the sensor fails to provide consistent data to the vehicle’s ABS (Anti-lock Braking System) or traction control system.
BMW DTC C0504 symptoms
Symptoms of DTC C0504 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 functionality
- Inaccurate speedometer readings
BMW DTC C0504 causes
The common causes of DTC C0504 on a BMW are:
- Defective left front wheel speed sensor
- Corroded or damaged sensor wiring/connectors
- Interference from other electronic components
- Faulty ABS control module
BMW DTC C0504 seriousness
DTC C0504 should be taken seriously as it can affect the proper functioning of the ABS and traction control systems. Driving with a faulty wheel speed sensor can compromise vehicle safety, especially during emergency braking or slippery road conditions.
How to diagnose DTC C0504 on BMW
To diagnose DTC C0504 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault code and confirm it is C0504.
- Inspect the left front wheel speed sensor for any visible damage or corrosion.
- Check the sensor wiring and connectors for loose connections or breaks.
- Perform a road test to observe the sensor’s behavior under different driving conditions.
How to fix DTC C0504 on BMW
To fix DTC C0504 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 the sensor mounting area to ensure proper contact and signal transmission.
- If the issue persists, consult a professional mechanic for further diagnosis and repair.
How to erase DTC C0504 on BMW
To erase DTC C0504 on a BMW, you can use a diagnostic scanner to clear the fault code from the vehicle’s memory. After performing the necessary repairs or replacements, reset the ABS or traction control system to ensure the fault code does not reappear.
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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