Left Front Wheel Speed Sensor Circuit
Trouble with the left front wheel speed sensor signal.
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 left front wheel speed sensor is either sending a bad signal or isn't sending anything at all, which affects features like traction control and ABS.
What the computer is actually seeing
The computer expects a varying voltage signal from the wheel speed sensor as the vehicle moves. Typically, this signal ranges from 0 to 12 volts depending on wheel rotation speed.
What a healthy reading looks like
Expected voltage from the wheel speed sensor should fluctuate between 0 and 12 volts, with a typical reading around 5 volts at a stationary vehicle.
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 connector for visible damage or corrosion. Decide if repairs are needed.
- 22. Using a multimeter, check the wheel speed sensor output while spinning the wheel. Expect 0-12 volts. If there's no signal, the sensor may be faulty or disconnected.
- 33. If the sensor signal is fine, check the vehicle's ABS module for faults or internal failure.
- 44. Clear the code and test drive the vehicle. If the code returns, consider replacing the sensor.
Common causes
- Damaged wiring or connector to the sensor
- A failed wheel speed sensor
- Corrosion at the connections
- Brake rotor or wheel bearing interference
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but you may lose traction control and ABS features, increasing stopping distance in slippery conditions.
Will the code come back after resetting?
It may; if the underlying issue isn't fixed, the code will return after the vehicle is driven.
Why does this code pair with other codes?
Other codes may indicate issues with other wheel speed sensors or related systems like ABS and traction control, as they share components.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →