Wheel Speed Sensor Signal Range/Performance Problem (Left Front)
The left front wheel speed sensor is reporting a performance issue.
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What it means (plain English)
The sensor that tracks how fast the left front wheel is spinning has a problem; it might be sending incorrect speed readings to the car's computer.
What the computer is actually seeing
The vehicle's computer expects the left front wheel speed sensor to generate a signal that varies according to wheel speed. It usually produces a voltage signal between 0.5V to 2.5V based on wheel speed, and during a performance issue, it may show erratic signals or no signal at all.
What a healthy reading looks like
Left front wheel speed sensor voltage should fluctuate between 0.5V to 2.5V as the vehicle accelerates and decelerates, corresponding to actual wheel 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. Inspect the wiring and connector for the left front wheel speed sensor. Look for any signs of damage, corrosion, or disconnection.
- 22. Measure the voltage at the sensor connector with the ignition on (engine off). Check for a voltage between 0.5V and 2.5V while manually turning the wheel.
- 33. If the voltage is out of range or nonexistent, swap the wheel speed sensor with the right front sensor and see if the code moves to the right front sensor. If it does, replace the left front sensor.
- 44. If the voltage is good, check the ABS module for any stored fault codes that may indicate an issue with the control unit. Repair or replace the ABS module if needed.
Common causes
- Damaged wiring or connectors to the sensor
- Faulty wheel speed sensor
- Moisture or contaminants in the sensor area
- Issues with the ABS module
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderately severe; you can drive, but it's best to fix it soon to ensure proper braking and traction control.
Will this code come back after clearing it?
If the underlying issue is not resolved, yes, it will likely return.
Why does this code appear with other wheel speed codes?
Multiple wheel speed codes may appear if there's a common issue affecting the communication or signal from one or more wheel speed sensors.
Working a real vehicle right now?
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