C0661
Left Rear Wheel Speed Sensor B Circuit Low
C0661 is an OBD-II diagnostic trouble code meaning: Left Rear Wheel Speed Sensor B Circuit Low. Common causes: wheel speed sensor malfunction, open or shorted wiring harness. Estimated repair cost: $56–167.
Symptoms
- ABS/ESP indicator is on
- Disabling the anti-lock braking system
- Incorrect operation of cruise control
- Errors in other systems
Causes
- Wheel speed sensor malfunction
- Open or shorted wiring harness
- Problems with the sensor connector
- ABS module malfunction
How to Fix
- Check the integrity of the wiring harness and sensor connector
- Measure the resistance of the wheel speed sensor
- Check the sensor signal using an oscilloscope
- Replace the wheel speed sensor if necessary
- Check and clean magnetic ring (if applicable)
- Check the power and ground of the sensor circuit
Related codes
Error C0661 by Vehicle Brand
FAQ
What does the C0661 code mean?
C0661 is an OBD-II diagnostic trouble code that indicates: Left Rear Wheel Speed Sensor B Circuit Low
What causes a C0661 error code?
The most common causes of C0661 include: Wheel speed sensor malfunction; Open or shorted wiring harness; Problems with the sensor connector; ABS module malfunction.
How do I fix a C0661 diagnostic trouble code?
To fix C0661: Check the integrity of the wiring harness and sensor connector. Measure the resistance of the wheel speed sensor. Check the sensor signal using an oscilloscope. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0661?
Limited driving only, diagnose soon
How much does it cost to fix C0661?
The estimated repair cost for C0661 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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