C0031

Left Front Wheel Speed Sensor Circuit Low

Moderate severity

Voltage on the left front wheel speed sensor circuit is below the expected range. The fault is typically caused by a short to ground or an open in the supply line.

Common causes

Sensor wiring shorted to ground
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $90-390
Sensor coil open internally
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $90-390
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does C0031 mean?

C0031 means "Left Front Wheel Speed Sensor Circuit Low". It is a generic OBD-II code that points to a fault in the chassis.

What are the most common causes of C0031?

sensor wiring shorted to ground; sensor coil open internally; connector pins corroded - high contact resistance — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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