Left Front Wheel Speed Sensor Circuit Range/Performance Problem
This code indicates an issue with the left front wheel speed sensor.
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 computer is not getting the correct signal from the left front wheel speed sensor, which measures how fast the wheel is turning. It should see a smooth change in voltage as the wheel turns, but if the signal is too high or low, it triggers this code.
What the computer is actually seeing
The wheel speed sensor sends a voltage signal to the computer that varies between about 0.5V to 5V depending on speed. If the voltage is outside of expected limits for a set distance, or if it doesn’t change when the wheel spins, the fault code sets.
What a healthy reading looks like
Voltage should range between 0.5V to 5V while moving. Signal frequency should match wheel speed, typically several pulses per second when the vehicle is rolling.
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.
- 1Check the left front wheel speed sensor wiring and connectors for damage or corrosion. Repair if needed.
- 2Measure the voltage at the wheel speed sensor connector while the vehicle is at rest and in motion. Confirm it ranges between 0.5V to 5V and varies as the vehicle moves.
- 3If the voltage is out of range, replace the left front wheel speed sensor and retest. If it’s within range but the code persists, check the connection at the PCM for integrity.
- 4Clear the code and take the vehicle for a test drive. If the code returns, investigate further into potential PCM malfunction or other wheel speed sensors.
Common causes
- Damage or corrosion to the wheel speed sensor wiring
- Faulty left front wheel speed sensor
- Poor connection at the wheel speed sensor or PCM connector
- Incorrect tire size causing speed miscalculations
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It’s moderate severity; you should fix it soon as it affects traction control and ABS operation.
Will this code come back after clearing it?
If the issue is still present—like a bad sensor or wiring—it will likely return after clear.
Why does this code affect only the left front wheel?
Each wheel speed sensor operates independently, so a problem with one sensor won't affect others unless it's a wiring or PCM issue.
Working a real vehicle right now?
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