Left Front Wheel Speed Sensor Circuit Problem
Issue with the left front wheel speed sensor circuit.
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What it means (plain English)
The left front wheel speed sensor has trouble sending the right information to the computer. This affects things like anti-lock brakes (ABS) and traction control.
What the computer is actually seeing
The ABS control module is not receiving a valid signal from the left front wheel speed sensor, typically in the form of voltage or frequency variation that corresponds to wheel speed.
What a healthy reading looks like
Should see a voltage between 0.5V and 4.5V when the wheel is rotating. If stationary, it may show 0V.
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.
- 1Inspect the wiring harness and connector for the left front wheel speed sensor. Look for any damage or corrosion.
- 2Check the resistance of the left front wheel speed sensor with an ohmmeter. Expected resistance is typically around 1,000 to 1,500 ohms. Replace if outside this range.
- 3Using a scan tool, monitor the live data for the left front wheel speed sensor while spinning the wheel. If no signal is detected, replace the sensor.
Common causes
- Damaged or corroded wiring to the sensor
- Faulty wheel speed sensor
- Poor connector contact
- Crossover issues with other wheel sensors
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means fix soon; the vehicle is drivable but may lack effective braking under certain conditions.
Will this code come back after clearing?
If the issue isn’t fixed, yes - it will return.
Why does this affect my traction control?
The traction control system relies on accurate wheel speed readings to function properly; inaccurate data can disable it.
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