Left Front Wheel Speed Sensor Performance
Indicates a fault in 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 expects a certain speed reading from the left front wheel, usually between 0-200 km/h (0-124 mph). If it sees a reading that's too low or too high compared to the other wheel speeds, it flags a problem.
What the computer is actually seeing
The ABS control module monitors the wheel speed sensors and expects to see consistent behavior. When the left front wheel sends a reading that’s out of sync with the other three wheels, or the sensor doesn't provide any signal at all when it should, the code is triggered.
What a healthy reading looks like
Wheel speed should be within 0-200 km/h, and voltages from the sensor typically range from 0.5V to 4.5V depending on speed.
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. Visually inspect the left front wheel speed sensor and wiring for any damage, corrosion, or loose connections.
- 22. Check the voltage at the wheel speed sensor connector with the vehicle key in the 'ON' position (but engine off). You should see around 0.5V-5V depending on movement; adjust for the vehicle's specifications.
- 33. If no voltage is detected, test the wiring continuity from the sensor connector back to the ABS module.
- 44. If wiring is good, replace the left front wheel speed sensor and clear the code.
- 55. After replacement, test drive the vehicle to see if the code returns. If it does, the ABS module may need inspection.
Common causes
- Faulty left front wheel speed sensor
- Damaged wiring or connectors to the sensor
- Wheel bearing issues affecting sensor placement
- Corrosion in the sensor connector
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive with this code active?
Yes, but you may notice issues with traction control or ABS functionality. It's best to fix it soon.
Will the code come back after clearing?
If the underlying issue isn't fixed, it will likely return after a short drive.
Why does this code sometimes show with other codes?
Multiple wheel speed sensor codes can indicate issues in the ABS system as a whole, like a common wiring fault.
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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