Left Front Wheel Speed Sensor Circuit Range/Performance Problem
This code indicates a problem with the left front wheel speed sensor's performance or 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 is either not sending a correct signal or the signal is out of the expected range because of a wiring issue or a faulty sensor.
What the computer is actually seeing
The engine control unit (ECU) expects a periodic voltage signal from the wheel speed sensor of around 0-5 volts as the wheel turns. If the signal is inconsistent or outside the expected range, the error is logged.
What a healthy reading looks like
Expected voltage from the wheel speed sensor when spinning the wheel should be between 0.5 and 4.5 volts, varying with 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 connectors for visible damage or corrosion at the left front wheel speed sensor. If damaged, repair or replace the wiring/connectors. Decision: If repaired, clear the code and test drive. If the code returns, proceed to step 2.
- 22. Measure the voltage output from the left front wheel speed sensor while the wheel is turning. Expected voltage is between 0.5 and 4.5 volts. Decision: If the voltage is out of range, replace the wheel speed sensor. If in range, go to step 3.
- 33. Check the ABS module for faults. Use a scan tool to read any codes related to the ABS. Decision: If there are additional ABS codes, diagnose them; if none, consider possible ABS module failure.
Common causes
- Damaged wiring or connectors
- Faulty left front wheel speed sensor
- ABS module malfunction
- Corroded sensor terminals
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you can drive but may experience issues with traction control and ABS, so fix it soon.
Will this code come back after clearing it?
If there's an underlying issue like a faulty sensor or wire, yes, it will likely return.
Why did this code appear after a wheel change?
It's possible the sensor was damaged during the change or the wiring was disturbed.
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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