Wheel Speed Sensor Rear Left Circuit Low
Indicates a low circuit condition in the rear left wheel speed sensor.
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 rear left wheel speed sensor is not sending a strong enough signal to the computer. This can happen if there's a short circuit or the sensor is faulty.
What the computer is actually seeing
The computer expects a signal voltage from the rear left wheel speed sensor to be around 0.5 to 12 volts while the wheel is turning. If it drops below 0.5 volts, it triggers the code.
What a healthy reading looks like
Signal voltage from the wheel speed sensor should be between 0.5 to 12 volts while in motion. A still wheel should show a voltage near the reference voltage (often around 5 volts).
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. Check wheel speed sensor connector for dirt, corrosion, or damage. Clean or repair as needed. Decision: If it's damaged, repair it; if not, go to step 2.
- 22. Inspect the wiring between the sensor and the ABS module for any signs of wear or damage. Move the wiring while monitoring sensor output. Decision: If a break is found, repair it; if not, go to step 3.
- 33. Using a multimeter, measure the voltage at the wheel speed sensor connector with the wheel turning. Expect 0.5 to 12 volts. Decision: If voltage is low or absent, replace the sensor; if voltage is normal, go to step 4.
- 44. Check the ABS module for faults or other codes. This could be affecting the sensor readings. Decision: If ABS module issues are present, consider addressing them; if not, check the wheel sensor signal with a scan tool.
Common causes
- Faulty wheel speed sensor
- Damaged wiring or connectors
- Poor electrical connection at the sensor
- Corrosion or dirt in the sensor connector
- ABS module issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderately safe to drive, but you might experience traction control or ABS issues.
Will this code come back after resetting?
Yes, it will likely return if the underlying issue with the sensor or wiring isn't fixed.
Why does this code show up with other wheel speed sensor codes?
It's common for multiple wheel speed sensor codes to appear if there's a problem in the ABS system or wiring.
Working a real vehicle right now?
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