Wheel Speed Sensor Front Left Circuit Malfunction
There’s a problem with the front left wheel speed sensor circuit.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer is having trouble getting the right speed data from the front left wheel sensor, which helps with things like ABS and traction control.
What the computer is actually seeing
The ABS module monitors signals from the wheel speed sensor, expecting a voltage signal between 0-5 volts proportional to wheel speed. A broken sensor or wire might drop this to 0 volts or cause erratic signals.
What a healthy reading looks like
The front left wheel speed sensor should output a smooth voltage signal between 0.5 and 4.5 volts while the vehicle is moving; around 0 volts when stationary.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the front left wheel speed sensor connector: Look for corrosion, loose pins, or damaged wires. If damaged, repair or replace the connector.
- 22. Check the sensor harness for continuity: Disconnect the sensor and measure resistance between the sensor and the ABS module. Expected resistance should be nearly 0 ohms; replace if open or shorted.
- 33. Test the wheel speed sensor: Measure the output voltage while spinning the wheel. Expected output is between 0.5 to 4.5 volts. If no or erratic signal is present, replace the sensor.
- 44. Clear the code and test drive the vehicle: If the code returns, consider testing the ABS module for issues.
Common causes
- Faulty wheel speed sensor
- Damaged wiring or connectors
- Corrosion in the connector
- Faulty ABS module
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive the vehicle?
You can drive, but it may affect traction control and ABS functionality, so fix it soon.
Will this code come back after I clear it?
If the problem isn't fixed, you can expect the code to return shortly after clearing it.
Why might this code pair with others?
Issues in the wheel speed sensor circuit can affect multiple sensor readings, triggering related codes.
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