Wheel Speed Sensor Circuit Failure (Left Front)
Problem with the left front wheel speed sensor or its 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 can't accurately read the speed of the left front wheel, which can happen if there's a broken wire or a bad sensor.
What the computer is actually seeing
The ABS controller expects a voltage signal between 0.5V to 0.9V when the wheel is stationary and a varying voltage from 0.5V to 12V as the wheel rotates.
What a healthy reading looks like
Expected wheel speed sensor output voltage varies between 0.5V (stationary) and 5V (moving).
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 left front wheel speed sensor wiring for damage or shorts, including the connector. If damaged, repair it. -> Next step if wiring is intact.
- 22. Check the voltage at the left front wheel speed sensor connector with the key on, engine off. You should see around 5V. If not, check the power supply and ground. -> If voltage is correct, proceed to the next step.
- 33. Swap the left front wheel speed sensor with the right front sensor. Clear the code and take the vehicle for a test drive. If the code moves to the right side, replace the sensor. If it stays, inspect the ABS module and other components.
Common causes
- Wiring damage or shorts in the left front sensor circuit
- Faulty left front wheel speed sensor
- Connector corrosion or bad connection at the wheel speed sensor
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but the ABS system won't function properly, which could affect braking in slippery conditions.
Will this code come back after clearing?
Yes, if the problem isn't fixed, the code will likely return after a short drive.
Why does this code pair with ABS issues?
Because the ABS system relies on accurate wheel speed data from all sensors to function correctly.
Working a real vehicle right now?
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