Left Front Wheel Speed Sensor Circuit Malfunction
There’s a problem with the left front wheel speed sensor or its 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. If it’s reporting bad data or isn’t working, the computer can't tell if the wheel is skidding or stopping properly, affecting things like ABS and traction control.
What the computer is actually seeing
The vehicle's computer expects a voltage signal reflecting the wheel speed. A working sensor should send a consistent AC voltage between 0.5V and 2.5V when the wheel is spinning.
What a healthy reading looks like
Voltage from the left front wheel speed sensor should be between 0.5V (at low speed) to 2.5V (at high speed) while moving.
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 wiring and connectors at the left front wheel sensor for damage or corrosion. Repair or replace as needed. Decision: If wiring is damaged, repair and retest. If not, proceed to step 2.
- 22. Use a scan tool to check for other related codes. Note any patterns or additional failures. Decision: If other codes are present related to the ABS or traction control, investigate those systems. If no other codes, proceed to step 3.
- 33. Measure the voltage output from the sensor with a multimeter while spinning the wheel. Check for 0.5V to 2.5V AC voltage. Decision: If readings are within range, suspect ABS module failure. If readings are out of range or no signal is present, replace the wheel speed sensor.
Common causes
- Damaged wheel speed sensor
- Corroded or loose electrical connections
- Wiring harness issues (frayed or shorted wires)
- Faulty ABS module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but can affect ABS and traction control functions. Fix it soon.
Will this code come back after a reset?
Yes, if the underlying issue isn't fixed, the code will return.
Why does this code sometimes pair with others?
It often pairs with codes related to other wheel sensors or the ABS module, indicating a broader issue with the brake system.
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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