Left Front Wheel Speed Sensor Circuit Range/Performance Problem
This code indicates an issue 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 is sending a weird signal to the computer, which is either too high, too low, or erratic, making it think something's wrong with the speed reading.
What the computer is actually seeing
The wheel speed sensor sends a voltage signal that varies as the wheel turns. The computer expects the signal to change in a consistent manner based on vehicle speed. If the signals are outside normal ranges (0.5 to 4.5 volts typically), it triggers this code.
What a healthy reading looks like
The left front wheel speed sensor should output between 0.5V (stationary) to 4.5V (maximum 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.
- 1Check the wiring and connectors for visible damage or corrosion, including the connector at the sensor and the ABS module.
- 2Measure the voltage at the wheel speed sensor with the vehicle stationary; it should be around 0.5V. If this is not within range, replace the sensor.
- 3Spin the left front wheel and measure the voltage output from the sensor; it should increase smoothly as the wheel turns. If not, the sensor may be faulty.
- 4Inspect the ABS module for fault codes; if other related codes are present, diagnose them as well.
Common causes
- Faulty left front wheel speed sensor
- Corroded or damaged wiring/connectors
- Bad wheel bearing affecting sensor operation
- Faulty ABS module
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code active?
It’s drivable but may affect ABS and traction control, so it's best to repair it soon.
Will this code come back after reset?
If the underlying issue isn't fixed, yes, it'll likely return after the reset.
Does this code relate to issues with the right wheel speed sensor?
Not directly, but if the left speed sensor is faulty, it can confuse other systems that depend on accurate speed signals.
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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