Wheel Speed Sensor Circuit Malfunction (Left Rear)
The left rear wheel speed sensor is having a malfunction.
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 computer is trying to read the speed of the left rear wheel but it's not getting a good signal, which can affect traction control and ABS functions.
What the computer is actually seeing
The wheel speed sensor should send a voltage signal that varies with wheel speed. If the signal is low or erratic, the computer thinks there's a problem and sets this code.
What a healthy reading looks like
Expected voltage output from the wheel speed sensor is usually between 0.5 to 2.5 volts at rest, increasing with wheel rotation.
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 rear wheel speed sensor and its wiring for any visible damage or broken connections. Decision: If damaged, repair or replace the sensor/wiring.
- 22. Check the voltage at the wheel speed sensor connector when the vehicle is off; you should see battery voltage (approximately 12 volts) on the power wire. Decision: If no voltage, trace back to wiring or ABS module.
- 33. If voltage is good, spin the left rear wheel by hand and use a multimeter to measure the signal voltage from the sensor; it should fluctuate as the wheel spins. Decision: If no fluctuation, replace the wheel speed sensor.
- 44. If the sensor tests good, test the ABS module for faults or errors. Decision: If ABS module is faulty, consider replacement.
Common causes
- Faulty left rear wheel speed sensor
- Damaged wiring or connectors to the sensor
- Corrosion or dirt on the sensor mount
- ABS module faults
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but you may experience issues with traction control and ABS, which are critical for safe driving under slippery conditions.
Will this code clear itself?
If the problem is resolved, the code may clear itself after a few driving cycles, but you should always clear codes manually after repairs.
Why does this code pair with others like C0210?
These codes often appear together because they all relate to wheel speed sensor circuits, and when one sensor fails, it can affect the others.
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