Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the sensor that tells the car how fast the back right wheel is spinning.
The vehicle's computer has detected an issue with the power supply to the right rear wheel speed sensor.
The C003B code is set when the anti-lock brake system (ABS) module detects a malfunction in the power supply circuit of the right rear wheel speed sensor. This sensor is critical for monitoring the wheel's rotation speed and ensuring proper operation of the ABS and traction control systems.
• ABS warning light on
• Traction control light on
• Inoperative ABS or traction control
• Faulty right rear wheel speed sensor
• Damaged wiring or connectors
• Malfunctioning ABS module
ABS: Anti-lock Braking System
OBD-II: On-Board Diagnostics II
• Inspect the right rear wheel speed sensor and wiring for damage.
• Check the electrical connections and ensure they are secure.
• Test the sensor with a multimeter to verify proper operation.
• Replace the right rear wheel speed sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the ABS module if necessary.
• Multimeter
• OBD-II scanner
• Basic hand tools
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect wheel speed sensors and wiring.
• Keep the ABS system clean and free of debris.
• Perform routine maintenance checks.
Sensor Issue
• Do not ignore the ABS warning light.
• Have the vehicle inspected by a professional if unsure.
Check with the vehicle manufacturer for warranty coverage on ABS components.
This code has been associated with ABS sensor issues in various models, often due to environmental factors like dirt and moisture.
Moderate – While the vehicle may still be drivable, the ABS and traction control systems may not function properly, which can affect safety.
Driving with a malfunctioning ABS system can increase the risk of accidents during emergency braking situations.
• Vehicle on a flat surface
• Ignition in the 'ON' position
The right rear wheel speed sensor is located near the brake assembly of the right rear wheel.
Q: Can I drive with the C003B code?
A: It's possible to drive, but the ABS and traction control systems may not work properly, which can be dangerous.
Q: How do I reset the ABS light?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
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Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
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Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
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