Left Front Wheel Speed Sensor Circuit Range/Performance Problem
Indicates 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 is either not sending a signal, sending a faulty signal, or the wiring is damaged, affecting system functions like ABS or traction control.
What the computer is actually seeing
The vehicle's computer expects to see a voltage signal from the left front wheel speed sensor that varies with vehicle speed. If the signal is too high or too low compared to other wheel sensors, it triggers this code.
What a healthy reading looks like
Normal operating range is typically 0-5 volts; at rest, it should be around 0.5 volts and increase with wheel 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 the left front wheel speed sensor. Look for signs of damage, corrosion, or loose connections. If found, repair or replace as needed. Decision: Is the wiring intact?
- 22. Measure the voltage at the left front wheel speed sensor with the key on and the engine off. You should see around 0.5 volts. Decision: Is the voltage correct?
- 33. If the voltage is incorrect, check the sensor itself. Remove the sensor and inspect for physical damage or dirt. Test the sensor with a multimeter. Decision: Is the sensor functioning within specs?
- 44. If the sensor is working correctly, check the ABS module for faults using a scan tool. Decision: Are there additional ABS fault codes present?
- 55. If no faults found in the module and the sensor is operational, inspect the wheel bearing for rust or damage, which can interfere with the sensor's reading.
Common causes
- Faulty left front wheel speed sensor
- Damaged wiring or connectors
- Bad ABS control module
- Excessive rust on the hub
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe but can affect braking performance; fix this issue soon.
Will the code come back after clearing it?
Yes, if the underlying issue isn't fixed, the code will return.
Why does this code appear with other wheel speed sensor codes?
The vehicle's computer monitors speed differences between wheels. If one sensor is faulty, it can trigger multiple codes.
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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