Wheel Speed (Left Front) Sensor Circuit Range/Performance Problem
The left front wheel speed sensor is not providing the expected signal.
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What it means (plain English)
The computer is looking at the left front wheel speed sensor and sees it's sending weird or no signals, like if it's supposed to be at 0 to 5 volts but is out of that range or completely missing.
What the computer is actually seeing
When the vehicle is moving, the left front wheel speed sensor should produce a frequency signal based on wheel rotation. If it's faulty, the signal may drop below a certain threshold (for example, less than 0.5 V) or stay constant while the vehicle moves.
What a healthy reading looks like
Expect a voltage change from 0 to 5 V as the wheel turns. Frequencies should vary with speed, typically around 1-10 Hz while moving at low speeds.
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. Check the wiring and connectors to the left front wheel speed sensor for damage or corrosion. Repair if needed. Decision: If repairs are made, clear codes and retest.
- 22. Measure the voltage at the sensor connector with the vehicle running. You should see between 0-5 V. Decision: If there's no voltage, check the wiring back to the module.
- 33. Check the sensor output while spinning the wheel. Use a multimeter to watch for a varying voltage. Expect 0-5 V as the wheel turns. Decision: If no change, replace the wheel speed sensor.
- 44. Inspect the ABS control module for any faults or codes. Decision: If the module shows faults, diagnose and repair the module.
Common causes
- Dirty or damaged wheel speed sensor
- Faulty wiring or connectors
- ABS control module malfunction
- Brake system issues
- Wheel bearing problems
Typical repair cost
$100-$300
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It is generally not safe, as this affects ABS and traction control systems.
Will this code come back after clearing?
Yes, if the underlying issue isn't resolved, the code will likely return.
Why does this code appear with other codes?
Multiple wheel speed sensor codes often indicate a common issue in the ABS or wiring system.
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