Wheel Speed Sensor Left Front Circuit
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)
The left front wheel speed sensor sends info about how fast the wheel is turning to the computer. If there's a problem, the computer can't tell how fast this wheel is going, which can affect brakes and stability control.
What the computer is actually seeing
The computer expects a voltage signal from the left front wheel speed sensor typically between 0.5 volts (at rest) to about 5 volts (when the wheel is spinning). If it detects a constant voltage of below 0.3 volts or above 4.5 volts, or if the frequency is inconsistent, it triggers this code.
What a healthy reading looks like
0.5 - 5 V from the wheel speed sensor; frequency of 0 - 20 Hz at low speeds; increasing with vehicle 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 connectors at the left front wheel speed sensor for any visible damage, corrosion, or loose connections. If found, repair or replace the affected components.
- 22. Measure the voltage at the left front wheel speed sensor connector while the vehicle is stationary. It should read around 0.5 volts. If it doesn’t, continue with the next step.
- 33. With the vehicle safely lifted, spin the left front wheel and observe the voltage reading at the sensor connector again. It should increase to around 5 volts as the wheel turns. If it remains low or does not change, consider replacing the sensor.
- 44. If the sensor and wiring appear fine, use a scan tool to check for any related trouble codes or ABS system faults. If other codes are present, investigate those as they may affect this sensor's reading.
Common causes
- Faulty left front wheel speed sensor
- Damaged wiring or connectors
- Corrosion at the sensor connector
- Faulty ABS control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally drivable, but stability control and ABS may not function properly, which could affect safety.
Will this code return after resetting?
If the issue is still present, yes, the code will likely come back after a reset.
Why does this code pair with other codes?
Codes can be linked due to faults in the same system, such as a bad sensor affecting multiple readings.
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