ABS Wheel Speed Sensor Circuit Failure - Left Front
Indicates a fault in the left front wheel speed sensor 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 not sending accurate data to the ABS (anti-lock braking system) control module, which might impact the braking performance.
What the computer is actually seeing
The ABS control module expects a consistent voltage signal (usually between 0.5V to 5V) from the left front wheel speed sensor that correlates with wheel rotation speed. If the signal is out of range or missing, the system triggers this fault code.
What a healthy reading looks like
Voltage from the wheel speed sensor should be between 0.5V (stationary) and 5V (moving).
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 connectors for damage or corrosion. Decision: Repair or replace damaged parts as needed. If ok, move to step 2.
- 22. Measure the voltage at the wheel speed sensor connector with the key on, engine off. Expected voltage should be around 5V. Decision: If not, check the wiring to the ABS control module. If OK, move to step 3.
- 33. With the engine running, spin the left front wheel and check the signal voltage at the sensor connector. It should vary between 0.5V and 5V. Decision: If it doesn't, replace the wheel speed sensor. If it does, move to step 4.
- 44. Check the ABS control module's connection and ground. Look for any signs of damage. Decision: Repair connection if damaged. If all connections are good, and the sensor is functioning, consider replacing the ABS control module.
Common causes
- Damaged wiring to the left front wheel speed sensor
- Faulty left front wheel speed sensor
- Corroded connector on the wheel speed sensor
- Malfunctioning ABS control module
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive the vehicle with this code?
Yes, but be cautious as the ABS system may not function properly, increasing stopping distances.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code pair with other codes?
Multiple wheel speed sensor codes can indicate an issue affecting more than one sensor or a common wiring problem.
Working a real vehicle right now?
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