Front Left Wheel Speed Sensor Circuit Range/Performance Problem
The system detects an issue with the front left wheel speed sensor performance.
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 front left wheel speed sensor is not sending accurate speed data to the vehicle's computer. This can happen if there's a problem with the sensor itself, its wiring, or even with the wheel hub assembly where it's mounted.
What the computer is actually seeing
The computer sees inconsistent or out-of-range voltage readings from the front left wheel speed sensor, which should normally output a frequency based on wheel speed.
What a healthy reading looks like
The wheel speed sensor should output between 0.5V to 5V AC signal in accordance with wheel speed, typically showing a frequency of 30Hz to 200Hz during normal operation.
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 for obvious wiring issues or damaged connectors at the front left wheel sensor.
- 2Inspect the sensor for dirt or metal debris that might affect performance.
- 3Test the wheel speed sensor output using a multimeter while spinning the wheel; expected output should be between 0.5V to 5V AC.
- 4Inspect the hub assembly for excessive wear or damage; replace if necessary.
- 5Clear the codes and take the vehicle for a test drive to see if the code returns.
Common causes
- Faulty front left wheel speed sensor
- Damaged wiring or connectors
- Metal debris on the sensor
- Malfunctioning wheel bearing or hub assembly
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's usually drivable, but you may experience traction control issues or ABS malfunctions.
Will this code come back after resetting?
If the problem isn't fixed, yes, the code will likely return.
Why does this code sometimes pair with C003D?
C003D indicates a similar issue on the front right wheel; both sides can fail or be affected by the same conditions.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →