Left Front Wheel Speed Sensor Circuit
Indicates a problem with the left front wheel speed sensor.
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 vehicle's computer is telling you that it's not getting the right signals from the sensor that tracks how fast the left front wheel is spinning.
What the computer is actually seeing
The electronic control unit (ECU) expects a range of 0-5 volts from the wheel speed sensor, which varies based on wheel rotation. If it sees a voltage outside of this range or a flat line, it triggers this code.
What a healthy reading looks like
0-5 volts from the wheel speed sensor when the wheel is turning; 0 volts when stationary.
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.
- 1Check the wiring and connectors at the left front wheel speed sensor for corrosion or damage.
- 2Verify the sensor output with a multimeter: it should give 0-5 volts based on wheel speed.
- 3Inspect for any physical damage to the wheel speed sensor itself or the mounting area.
- 4If no issues found, check related components like the ABS module for faults. Confirm that the brake system is functioning properly.
Common causes
- Damaged wheel speed sensor
- Wiring issues or bad connectors
- Brake issues affecting sensor readings
- Faulty Electronic Control Unit (ECU)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but ABS and traction control functions might be compromised. Address the issue soon.
Can this code come back after clearing it?
Yes, if the underlying issue isn't resolved, it may return after a driving cycle.
Does this code affect other systems in the vehicle?
Yes, it may impact the ABS and traction control systems since they rely on accurate wheel speed data.
Working a real vehicle right now?
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