Left Front Wheel Speed Sensor Circuit Fault
There's a problem with the left front wheel speed sensor 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 left front wheel speed sensor measures how fast the wheel is turning and sends that info to the computer. If there's a fault detected, it could be a bad sensor, wiring issue, or connector problem.
What the computer is actually seeing
The vehicle's control module monitors the signal from the left front wheel speed sensor. If the voltage drops below 0.5 volts or rises above 4.5 volts when it should be in a normal range based on the wheel speed, it sets this code.
What a healthy reading looks like
The wheel speed sensor output should be between 0.5V and 4.5V when the wheel is turning; at a complete stop, it should read close to 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.
- 11. Inspect the left front wheel speed sensor wiring and connectors for damage or corrosion. If found, repair or replace.
- 22. Measure the voltage at the wheel speed sensor connector while the vehicle is moving. It should be between 0.5V and 4.5V. If it's not, the sensor may be faulty. Replace if necessary.
- 33. Check for any other codes present. If multiple wheel speed sensors show faults, check the ABS module for failure. If this code is alone, focus on the left front sensor.
Common causes
- Corroded wiring or connectors
- Faulty wheel speed sensor
- Damaged harness or connectors
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive with this code?
Yes, but fix it soon. It can affect traction control and ABS functionality.
Will this code come back after I clear it?
It depends on whether the underlying issue is fixed. If the sensor or wiring is bad, it likely will.
Why does this code appear with other wheel speed codes?
If there’s a wiring issue affecting multiple connectors, it can trigger several codes at once.
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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