Wheel Speed Sensor (Front Left) Range/Performance Problem
The front left wheel speed sensor is reporting an implausible reading.
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 uses a sensor on each wheel to monitor their speed. If the front left sensor sends a number that doesn't match the expected speed based on the other wheels, it sets this code.
What the computer is actually seeing
The ABS module compares the wheel speed of all four wheels. If the front left wheel speed differs significantly (like more than 5 MPH) from the others when the vehicle is moving, it triggers this code.
What a healthy reading looks like
Normal wheel speed readings at 60 MPH should be close to the speed indicated by the other wheels, typically within 2-3 MPH variance.
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 wiring and connectors for the front left wheel speed sensor. Look for signs of damage or corrosion.
- 22. Measure the voltage at the wheel speed sensor connector with the key on, engine off. Expect around 5V. If no voltage, check the wiring back to the ABS module.
- 33. With the vehicle on the ground, check the sensor's resistance. It should be between 1kΩ to 2kΩ. If it's open or shorted, replace the sensor.
- 44. Verify the behavior of the sensor while spinning the wheel. Use a scan tool to watch live data; all wheel speeds should match closely. If front left is drastically off, replace the sensor.
- 55. Lastly, check if tire sizes and pressures are uniform across all wheels.
Common causes
- Faulty front left wheel speed sensor
- Damaged wiring or connector for the wheel speed sensor
- Bad ABS module
- Difference in tire sizes/pressures among wheels
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
You can drive, but expect potential ABS issues like longer stopping distances or loss of stability control.
Will this code come back if I clear it?
If the underlying issue isn't fixed, the code will likely return after driving a short distance.
Why do I see this code with others?
This code often pairs with other wheel speed sensor codes, indicating broader issues with the ABS system.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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