C003B
Right Rear Wheel Speed Sensor Supply
C003B is an OBD-II diagnostic trouble code meaning: Right Rear Wheel Speed Sensor Supply. Common causes: open or short circuit in wiring harness, oxidation of sensor connector contacts. Estimated repair cost: $33–167.
Symptoms
- The ABS/ESP lamp on the instrument panel is on
- Disabling the ABS/ESP system
- Incorrect operation of cruise control (if equipped)
- Errors in the stabilization system
Causes
- Open or short circuit in wiring harness
- Oxidation of sensor connector contacts
- ABS relay or fuse malfunction
- Mechanical damage to the wheel speed sensor
- Problems with the ABS control unit
How to Fix
- Check ABS circuit fuse and relay
- Inspect the wiring harness for damage
- Check the sensor connector for oxidation
- Measure the sensor resistance (usually 800-2000 Ohm)
- Check the supply voltage at the sensor connector (should be ~12V)
- If necessary, replace the sensor or restore the power circuit
Related codes
Error C003B by Vehicle Brand
FAQ
What does the C003B code mean?
C003B is an OBD-II diagnostic trouble code that indicates: Right Rear Wheel Speed Sensor Supply
What causes a C003B error code?
The most common causes of C003B include: Open or short circuit in wiring harness; Oxidation of sensor connector contacts; ABS relay or fuse malfunction; Mechanical damage to the wheel speed sensor.
How do I fix a C003B diagnostic trouble code?
To fix C003B: Check ABS circuit fuse and relay. Inspect the wiring harness for damage. Check the sensor connector for oxidation. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C003B?
Limited driving only, diagnose soon
How much does it cost to fix C003B?
The estimated repair cost for C003B is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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