Left Rear Wheel Speed Sensor Range/Performance Problem
The left rear wheel speed sensor is not reading correctly or is out of range.
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 checks how fast each wheel is turning. If the left rear wheel sensor is showing an unusual speed—like not working at all or too slow compared to the others—the computer gets a warning.
What the computer is actually seeing
The ABS control module monitors the voltage signal from the left rear wheel speed sensor. A valid signal usually ranges from 0 to 5 volts. If the voltage stays constant at 0 volts or jumps outside the expected range when in motion, a fault code triggers.
What a healthy reading looks like
Wheel speed sensor output should be near vehicle speed and change according to movement. Expect a steady voltage signal when stationary and a voltage change that reflects speed when moving, typically between 0.5V - 4.5V depending on the speed and vehicle design.
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 wiring and connector at the left rear wheel speed sensor. Look for any physical damage or corrosion. Decision: If damaged, repair or replace the wiring.
- 22. Test the left rear wheel speed sensor with a multimeter. Disconnect the sensor and check for resistance; should be between 500 to 1,500 ohms. Decision: If out of range, replace the sensor.
- 33. Reconnect the sensor and test the voltage while the vehicle is in motion. Use a scan tool to monitor the wheel speed data. Decision: If voltage does not change (stays at 0V or constant) while moving, suspect an ABS module issue.
- 44. Clear the code and take the vehicle for a test drive. If the code does not return and all wheels register speed, the issue is resolved. Decision: If the code returns, further inspect the ABS module.
Common causes
- Faulty left rear wheel speed sensor
- Damaged wiring or connectors
- Absence of motion detected by the sensor due to a bad ABS module
- Corrosion or poor connection at the sensor terminal
Typical repair cost
$$ - $$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It may be drivable but expect issues with ABS and stability control functions. Fix it soon to ensure safe operation.
Will this code come back after clearing it?
If the underlying issue is not fixed, yes, it will likely return after driving.
Why does this code sometimes pair with other codes?
Other codes may indicate problems with other wheel sensors or ABS system components, because they share the same data bus for communication.
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