C003B

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

1. Check ABS circuit fuse and relay
2. Inspect the wiring harness for damage
3. Check the sensor connector for oxidation
4. Measure the sensor resistance (usually 800-2000 Ohm)
5. Check the supply voltage at the sensor connector (should be ~12V)
6. If necessary, replace the sensor or restore the power circuit

Related codes

Error C003B by Vehicle Brand