Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is getting a weak signal from the sensor that measures how hard you press the brakes. It's like the sensor is whispering instead of speaking clearly.
The brake pressure sensor is responsible for measuring the hydraulic pressure in the brake system. If the sensor sends a low voltage signal to the car's computer, it triggers this code.
The C063B code indicates that the brake pressure sensor 'H' circuit is sending a voltage signal that is lower than the expected range to the electronic control unit (ECU). This could be due to a faulty sensor, wiring issues, or a problem with the ECU.
• ABS warning light on
• Reduced braking efficiency
• Brake pedal feels different
• Faulty brake pressure sensor
• Damaged or corroded wiring or connectors
• Faulty ECU
ECU: Electronic Control Unit
ABS: Anti-lock Braking System
• Use an OBD-II scanner to confirm the code.
• Inspect the brake pressure sensor and its wiring for damage.
• Test the sensor's voltage output with a multimeter.
• Replace the brake pressure sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECU if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect brake system components.
• Keep connectors clean and free from corrosion.
• Ensure proper maintenance of the braking system.
Sensor Issue
• Do not ignore the ABS warning light.
• Have your brakes inspected by a professional if you notice any issues.
• Regularly maintain your vehicle's brake system.
Check with your vehicle manufacturer for warranty coverage on brake system components.
This code has been associated with issues in vehicles with electronic brake systems, particularly in models with high mileage.
High – This issue can affect braking performance and safety.
Driving with a malfunctioning brake system can be dangerous. Address this issue promptly to ensure safety.
• Vehicle parked on a flat surface
• Ignition in the 'on' position
The brake pressure sensor is typically located near the master cylinder or integrated into the ABS module.
Q: Can I drive with a C063B code?
A: It's not recommended, as it can affect your braking performance and safety.
Q: How do I reset the ABS warning 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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