Left Front Wheel Speed Sensor Circuit
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 reads how fast the wheel is turning. If it fails, the ABS and traction control can't work properly.
What the computer is actually seeing
The ABS module expects a pulse signal between 0 and 5 volts from the wheel speed sensor that indicates wheel speed. A consistent reading around 1.5 volts while moving indicates normal operation.
What a healthy reading looks like
The wheel speed sensor signal should vary from 0 to 5 volts, depending on vehicle speed. At 5 mph, expect around 2 volts at the sensor output.
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 for damage or corrosion. Fix any issues found. Decision Point: If wiring is good, proceed to the next step. If damaged, repair and retest.
- 22. Check the resistance of the wheel speed sensor. A good sensor typically measures around 1,000 to 2,000 ohms. Decision Point: If resistance is within spec, go to the next step. If not, replace the sensor.
- 33. Use a scan tool to monitor the wheel speed sensor output while driving. Voltage should change with speed. Decision Point: If voltage changes normally, the issue may be in the ABS module. If it does not, replace the sensor.
Common causes
- Damaged wiring or connectors in the wheel speed sensor circuit
- Faulty wheel speed sensor
- Corrosion or dirt on the sensor or tone ring
- Abnormal ABS module operation
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you can drive, but you might not have ABS or traction control until it's fixed.
Will the code come back after I fix it?
If you correct the issue properly, it should clear and not return unless a new fault occurs.
Why does this code pair with others?
Wheel speed sensors are critical for ABS and traction control; issues can affect multiple systems.
Working a real vehicle right now?
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