Wheel Speed Sensor Rear Left Performance Problem
This code indicates a problem with the performance of 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 monitors how fast that wheel is turning. If it's sending bad or unusual data compared to the other wheels, it triggers this code.
What the computer is actually seeing
The ABS control module sees inconsistent wheel speed data from the rear left sensor compared to the front wheel sensors and the right rear sensor, typically differing by more than 15% at speeds over 5 mph.
What a healthy reading looks like
Wheel speeds should match within 5% across all wheels under similar driving conditions (e.g., 30 mph = 29.5 to 31.5 mph).
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 connectors for the rear left wheel speed sensor. Look for any damage or corrosion. If found, repair or replace as necessary.
- 22. Measure resistance across the rear left wheel speed sensor. It should be around 1,000 to 2,000 ohms. If it's open or shorted, replace the sensor.
- 33. Check the tone ring for damage or dirt. Clean or replace as needed to ensure proper sensor function.
- 44. Use a scan tool to monitor real-time wheel speed data. Compare speeds from all four wheels while driving. If the rear left sensor doesn't respond correctly, replace it.
Common causes
- Faulty rear left wheel speed sensor
- Damaged wiring or connectors to the sensor
- Wheel bearing issues affecting sensor signal
- Corrosion or dirt on the sensor or tone ring
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but fix it soon as it can affect ABS and traction control performance.
Will this code come back after clearing it?
It may return if the issue wasn't resolved, like a bad sensor or wiring fault.
Why does this code pair with other wheel speed sensor codes?
Inconsistent readings across different sensors can trigger multiple codes related to performance issues.
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