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 car's brake booster, which helps you stop the car easily. It's like when your toy car's brakes don't work well and it takes longer to stop.
The brake booster helps reduce the effort needed to apply the brakes. This code indicates that the internal power driver of the brake booster is not working within its expected range.
The C0595 code is triggered when the vehicle's control module detects a performance issue with the internal power driver of the brake booster. This can affect the braking efficiency and may cause the brakes to feel hard or unresponsive.
• Hard brake pedal
• Increased stopping distance
• Brake warning light on dashboard
• Faulty brake booster
• Electrical issue in the brake booster circuit
• Defective control module
Brake Booster: A device that uses vacuum or hydraulic pressure to help reduce the effort needed to apply the brakes.
Control Module: A computer in the vehicle that controls various systems, including the brakes.
• Check for other related codes.
• Inspect the brake booster for damage or leaks.
• Test the electrical connections and wiring to the brake booster.
• Replace the faulty brake booster.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$300 - $800
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regular brake system maintenance
• Inspect brake components for wear and damage
• Ensure electrical connections are secure
Brake System Performance
• Do not ignore the brake warning light.
• Have your brakes inspected by a professional if you notice any changes in performance.
Check with your vehicle manufacturer for warranty coverage on brake system components.
This code has been associated with vehicles experiencing brake booster issues, particularly in models with electronic brake systems.
High – Brake performance is critical for vehicle safety.
Driving with compromised brakes can be dangerous and may violate traffic safety laws.
• Engine running
• Vehicle in motion
The brake booster is typically located between the brake pedal and the master cylinder in the engine compartment.
Q: Can I drive with a C0595 code?
A: It's not recommended to drive with this code, as it affects braking performance and safety.
Q: How is a brake booster different from a brake pedal?
A: The brake pedal is what you press with your foot, while the brake booster helps make it easier to press the pedal and stop the car.
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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