Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means there's a problem with the car's brake booster motor, which helps you stop the car. It's using too much electricity, like when a toy uses too many batteries too quickly.
The brake booster motor is drawing more current than expected, indicating a potential electrical issue or mechanical resistance.
The C0590 code is triggered when the brake booster motor's current draw is higher than the control module's predetermined threshold. This could be due to an electrical short, increased mechanical load, or a failing motor.
• Increased braking effort required
• Brake warning light on the dashboard
• Reduced braking performance
• Electrical short in the brake booster motor circuit
• Mechanical resistance in the brake booster system
• Faulty brake booster motor
Brake Booster: A device that increases the force applied from the brake pedal to the master cylinder.
Current Draw: The amount of electrical current consumed by a device or circuit.
• Inspect the brake booster motor and wiring for damage.
• Check for any mechanical obstructions in the brake booster system.
• Test the current draw of the brake booster motor.
• Repair or replace damaged wiring in the brake booster circuit.
• Remove any mechanical obstructions in the brake booster system.
• Replace the brake booster motor if faulty.
• Multimeter
• OBD-II scanner
• Basic hand tools
$200 - $600
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect brake system components.
• Ensure brake fluid is at the correct level.
• Address brake system warnings promptly.
Brake System Issue
• Avoid driving the vehicle until the issue is resolved.
• Consult a professional mechanic for diagnosis and repair.
Brake system components may be covered under the vehicle's powertrain or bumper-to-bumper warranty. Check with the manufacturer.
This code has been associated with vehicles using electronic brake booster systems, particularly in models from the mid-2010s.
High – Brake system issues can lead to reduced stopping power and increased risk of accidents.
Driving with a malfunctioning brake system can be dangerous and may violate vehicle safety regulations.
• Vehicle parked on a level surface
• Ignition in the 'On' position
The brake booster motor is typically located near the firewall in the engine compartment, connected to the brake master cylinder.
Q: Can I drive with a C0590 code?
A: It's not recommended to drive with this code, as it indicates a brake system issue that could affect your ability to stop safely.
Q: How can I reset the C0590 code?
A: The code can be reset using an OBD-II scanner after the underlying issue is fixed, but it's important to address the problem first.
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.
View on Amazon
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.
View on Amazon
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.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.