Wheel Speed Sensor Left Rear Circuit
There's a problem with the left rear wheel speed sensor signal.
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 rear wheel speed sensor is either faulty, disconnected, or the wiring is damaged, so the computer can't accurately measure how fast that wheel is turning.
What the computer is actually seeing
The ABS or traction control module is expecting a pulse signal from the left rear wheel speed sensor that indicates the wheel rotation speed. If this signal is absent or outside of normal parameters, the module sets this fault code.
What a healthy reading looks like
The signal should output a voltage between 0.5V to 5V while the vehicle is moving, pulsing with wheel speed, typically at around 0.6 to 2 Hz at idle for normal operation.
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 left rear wheel speed sensor wiring and connector for damage or corrosion. Repair or replace as necessary. Decision point: Are the wires intact? If yes, proceed; if no, fix this first.
- 2Using a multimeter, measure the voltage at the connector with the vehicle in motion. Expect 0.5 to 5 volts. Decision point: Is the voltage within range? If yes, the sensor is likely good; if no, replace the sensor.
- 3If the sensor appears to function correctly but the code persists, check other speed sensors; if one fails, it can cause communication issues. Decision point: Are other sensor readings correct? If yes, you may need to replace the ABS module; if no, replace the faulty sensors.
Common causes
- Faulty left rear wheel speed sensor
- Wiring issues in the left rear wheel speed sensor circuit
- Corrosion or damage at connector
- Faulty ABS module
- Issues with brake components affecting sensor
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderately safe, but avoid hard braking or sudden maneuvers since traction control may not function correctly.
Will this code come back after clearing?
It can return if the underlying issue isn't fixed, like a bad sensor or wiring problem.
Why does this affect the brakes?
The wheel speed sensors are crucial for ABS and traction control functions; without accurate readings, these systems can malfunction.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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