C0664
Left Rear Wheel Speed Sensor B Correlation
Left Rear Wheel Speed Sensor B Correlation: the value does not correlate with the related sensor or expected pattern. Wheel-speed signals feed ABS, ESC, traction control and the speedometer.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Common causes
Ordered by how often each turns out to be the cause.
- Sensor or tone ring faultCommon
Parts involved
- Lr Wss B
- Lr Wss
C0664 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.