Wheel Speed Sensor Circuit Failure (Left Front)
Indicates a problem with 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)
Your vehicle's computer monitors how fast each wheel is turning using sensors. If it can't read the left front wheel speed sensor, it thinks there's a problem, which can affect stability and braking.
What the computer is actually seeing
The computer expects a voltage signal from the left front wheel speed sensor, typically between 0.5V to 5V depending on wheel speed. A failure means it sees either no signal or an out-of-range signal.
What a healthy reading looks like
Voltage from left front wheel speed sensor should be between 0.5V and 5V at varying speeds; when stationary, it should be near 0V.
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 left front wheel speed sensor for any visual damage or corrosion. Decision: If damaged, repair or replace as needed. If good, proceed to step 2.
- 22. Measure the voltage at the wheel speed sensor connector with the key on and the engine running. Expect 0.5V to 5V. Decision: If you don't see this, the sensor may be faulty; replace it. If voltage is present, proceed to step 3.
- 33. Test the continuity of the wiring harness back to the ABS module. Use a multimeter and check for resistance; expect less than 5 ohms. Decision: If resistance is higher, repair the wiring. If continuity is good, there could be an issue with the ABS module.
Common causes
- Faulty left front wheel speed sensor
- Damaged wiring or connector to the sensor
- Corrosion at electrical connections
- Open circuit in the wiring harness
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's not recommended to drive with this code because it can affect anti-lock brakes and traction control, reducing safety.
Will this issue come back after repair?
If the wiring and connector are properly fixed and the sensor is replaced, it shouldn't come back unless there's another underlying electrical issue.
Why is this code paired with other wheel speed codes?
Multiple codes may indicate a broader issue with the ABS system, affecting multiple wheel speed sensors or circuit faults.
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