Wheel Speed Sensor Rear Left Circuit Failure
This code indicates a fault in the rear left wheel speed sensor circuit.
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 sending bad signals to the ABS system, meaning the system can't accurately detect how fast that wheel is spinning, which can affect braking performance and stability control.
What the computer is actually seeing
The ABS control module sees erratic or no signal input from the rear left wheel speed sensor, often interpreting it as a failure.
What a healthy reading looks like
Voltage should be between 0.5V to 5V while moving; frequency of signal should change based on wheel speed.
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.
- 1Inspect the rear left wheel speed sensor and connector for visible damage or corrosion. Decision: If damaged, replace the sensor. If okay, proceed to step 2.
- 2Test the voltage at the rear left wheel speed sensor connector. Expect 0.5V to 5V while the wheel turns. Decision: If out of range, check wiring back to the ABS module. If within range, proceed to step 3.
- 3Check the ABS module for fault codes using a scan tool; clear codes and retest vehicle operation. Decision: If the code returns, consider replacing the ABS control module.
Common causes
- Damaged wheel speed sensor
- Wiring issue or short circuit in the sensor circuit
- Faulty ABS control module
- Corrosion or dirt on the sensor connector
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's usually safe to drive, but braking performance may be compromised; fix it soon.
Will this code come back after clearing?
Yes, if the underlying issue isn't fixed, the code will return.
Why is this problem related to my ABS?
The ABS system relies on accurate wheel speed data to control braking and prevent wheel lock-up.
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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