Wheel Speed Sensor Front Left Circuit
There’s an issue with the front left wheel speed sensor signal.
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 looking at how fast each wheel is turning to help with things like ABS and traction control, and it’s not getting a proper signal from the front left wheel sensor, which might mean the sensor is broken or the wiring is damaged.
What the computer is actually seeing
The ABS control module expects a consistent voltage signal from the front left wheel speed sensor, usually around 0 to 5 volts. If the sensor is faulty or there's a wiring issue, the signal can drop to 0 volts or fluctuate unexpectedly.
What a healthy reading looks like
Front left wheel speed sensor output should match the other wheel speeds within 0-5 volts, or 0-50 km/h (0-31 mph) during a test drive with no faults in 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 connector for the front left wheel speed sensor. Look for any frays, corrosion, or disconnections. If found, repair as needed.
- 22. Check the sensor itself for damage or dirt buildup. Clean or replace if it’s faulty or excessively dirty.
- 33. Use a multimeter to measure the voltage at the connector while the vehicle is in motion. You should see a voltage output similar to the other wheel sensors.
- 44. If the sensor and wiring are good, use a scan tool to check for additional codes that may indicate a larger ABS module problem. If no faults are present, replace the ABS control module.
Common causes
- Faulty front left wheel speed sensor
- Damaged wiring or connector to the sensor
- Corrosion or dirt on the sensor or connector
- ABS control module failure
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive with this code active?
Yes, but the ABS and traction control may not function properly, which can reduce safety during slippery conditions.
Will this code come back after I clear it?
If the issue is fixed, clearing the code should keep it from returning. If there’s still a fault, it will likely reappear.
Why does this code pair with other wheel speed sensor codes?
Multiple wheel speed sensor codes can show up if they are affected by the same underlying issue, like a faulty ABS control module or if the problem involves general wiring faults.
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 →