Wheel Speed Sensor Rear Left Circuit Failure

This code means the car's computer can't read the speed of the rear left wheel correctly, which could trigger warning lights and affect traction control or ABS systems.

The ABS module expects a voltage signal from the rear left wheel speed sensor. It should be between 0 volts (stationary) and around 12 volts (moving). If there's no signal or it's out of range, the code sets.

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.

1. 11. Visually inspect the rear left wheel speed sensor wiring and connector for damage or corrosion.
2. 22. Check the resistance of the wheel speed sensor. It should typically be between 1,000 and 2,500 ohms.
3. 33. Use a scan tool to monitor the wheel speed sensor signal while the vehicle is moving. You should see a variable voltage response.
4. 44. If the sensor readings don’t change when moving, replace the rear left wheel speed sensor.
5. 55. If the sensor is good, check the wiring continuity back to the ABS module. Use a multimeter to ensure there's no open or short circuit.
6. 66. If the wiring is good, test the ABS module for proper function.

• Damaged or corroded wiring in the wheel speed sensor circuit
• Faulty rear left wheel speed sensor
• Bad connectors or poor connections at the sensor
• ABS module malfunction

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