Left Front Wheel Speed Sensor Circuit Failure
There's a problem with the left front 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 left front wheel speed sensor is not transmitting a signal properly, which can happen if the wiring is damaged or if the sensor itself is faulty.
What the computer is actually seeing
The ABS control module is not receiving the expected speed signal from the left front wheel sensor, leading to a reading of 0 mph or erratic values when the vehicle is in motion.
What a healthy reading looks like
A properly functioning wheel speed sensor should output a signal of 0.5 to 2.0 volts AC at speeds of 0-60 mph. A reading below 0.1V or erratic signals indicate a fault.
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 left front wheel speed sensor wiring and connector for damage or corrosion. Repair or replace if necessary. Decision point: Is the wiring intact? If yes, go to step 2; if no, repair/replace and clear codes.
- 22. Measure the output voltage of the left front wheel speed sensor with the vehicle in motion. Expected value is between 0.5 and 2.0 volts AC. Decision point: Is the voltage within range? If yes, go to step 3; if no, replace the sensor.
Common causes
- Corroded or damaged wiring to the sensor
- Faulty left front wheel speed sensor
- Loose or damaged connector at the sensor
- Wheel bearing issues affecting sensor placement
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive the vehicle with this code?
Yes, but expect reduced ABS functionality and possibly impaired traction control. It's advisable to fix it soon.
Will this code come back after clearing?
If the underlying issue is not resolved, yes, the code will likely return after clearing.
Why do I see this code with other wheel speed sensor codes?
Multiple wheel speed sensor codes can occur because they operate as a system. If one fails, it can cause issues in related sensors.
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