C0504
Left Front Wheel Speed Sensor A Intermittent/Erratic
C0504 is an OBD-II diagnostic trouble code meaning: Left Front Wheel Speed Sensor A Intermittent/Erratic. Common causes: damage to the wheel speed sensor, contamination of the sensor or its magnetic ring. Estimated repair cost: $56–167.
Symptoms
- Incorrect ABS operation
- Check engine light comes on
- Loss of ESP or TCS function
- Unstable speedometer readings
Causes
- Damage to the wheel speed sensor
- Contamination of the sensor or its magnetic ring
- Damage to the sensor wiring harness
- Poor contact in the sensor connector
- ECU malfunction
How to Fix
- Check the status of the wheel speed sensor
- Clean the sensor and magnetic ring
- Check wiring harness and connectors for damage
- Replace the wheel speed sensor if necessary
- Check the operation of the ABS/ESP systems after repair
Related codes
Error C0504 by Vehicle Brand
FAQ
What does the C0504 code mean?
C0504 is an OBD-II diagnostic trouble code that indicates: Left Front Wheel Speed Sensor A Intermittent/Erratic
What causes a C0504 error code?
The most common causes of C0504 include: Damage to the wheel speed sensor; Contamination of the sensor or its magnetic ring; Damage to the sensor wiring harness; Poor contact in the sensor connector.
How do I fix a C0504 diagnostic trouble code?
To fix C0504: Check the status of the wheel speed sensor. Clean the sensor and magnetic ring. Check wiring harness and connectors for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0504?
Limited driving only, diagnose soon
How much does it cost to fix C0504?
The estimated repair cost for C0504 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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