Wheel Speed Sensor - Left Front Circuit
Issues detected in the left front wheel speed sensor circuit.
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What it means (plain English)
The computer is losing signal or seeing inconsistent data from the left front wheel speed sensor, which can affect ABS and traction control systems.
What the computer is actually seeing
The ABS module sees erratic or no voltage readings from the left front wheel speed sensor, indicating a problem with either the sensor itself or the wiring.
What a healthy reading looks like
Should see a voltage signal between 0.5V and 5V while the vehicle is moving, varying with speed, or a resistance reading between 1000 to 1500 ohms when testing the sensor at rest.
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 from the left front wheel speed sensor for any signs of damage, fraying, or corrosion. If damaged, repair or replace as needed.
- 22. Verify the sensor's resistance using a multimeter. It should be between 1000 and 1500 ohms. If out of range, replace the sensor.
- 33. Check the voltage at the connector while the vehicle is moving. You should see a varying signal between 0.5V and 5V. If absent, inspect wiring further.
- 44. If the wiring and sensor are good, consider scanning with a capable tool to check for ABS module faults or issues.
- 55. Clear the codes and road test the vehicle to see if the code returns. After tests, make a note of the results.
Common causes
- Faulty left front wheel speed sensor
- Damaged wiring or connectors leading to the sensor
- Corrosion on sensor terminals
- ABS module issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means it's best to fix soon; however, the vehicle is typically still drivable unless the ABS or traction control systems are severely affected.
Will this code come back after clearing?
If the underlying issue isn’t resolved, yes, the code will likely return after driving.
Why does this code pair with ABS codes?
Because the wheel speed sensor is critical for ABS operation, any fault can trigger related ABS fault codes.
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