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 found a problem with the motor that helps the brakes work better. It's like when a toy's battery is low and it doesn't work right.
The code indicates an issue with the electrical circuit of the brake booster motor, specifically in the U-V-W phases, which affects its performance.
The C0586 code is triggered when the vehicle's control module detects a range or performance issue in the U-V-W circuit of the Brake Booster Motor B. This circuit is responsible for the proper functioning of the brake booster motor, which assists in applying the brakes with less effort from the driver. Any deviation from expected performance levels in this circuit results in this code being set.
• Increased effort required to apply brakes
• Brake warning light on the dashboard
• Unusual noises from the brake system
• Faulty brake booster motor
• Damaged wiring or connectors in the U-V-W circuit
• Faulty control module
Brake Booster: A device that increases the force applied to the brakes.
U-V-W Circuit: Refers to the three-phase electrical circuit used in motor control.
• Check for any visible damage to wiring and connectors.
• Test the brake booster motor for proper operation.
• Use a multimeter to check the continuity and resistance in the U-V-W circuit.
• Repair or replace damaged wiring or connectors.
• Replace the brake booster motor if faulty.
• Reprogram or replace the control module if necessary.
• Multimeter
• OBD-II scanner
• Basic hand tools
$200 - $600
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect brake system components.
• Ensure electrical connections are clean and secure.
• Perform routine maintenance checks.
Brake System Issue
• Do not ignore the brake warning light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if braking performance is compromised.
Check with the vehicle manufacturer for any applicable warranty coverage on brake system components.
This code has been associated with issues in vehicles with electric brake boosters, particularly in models with advanced braking systems.
High – Brake system issues should be addressed immediately to ensure vehicle safety.
Driving with impaired brakes can lead to accidents. Ensure repairs are done promptly to maintain safety.
• Vehicle stationary with engine running
• Brake pedal application
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 C0586 code?
A: It's not recommended to drive with this code active, as it indicates a potential issue with your braking system.
Q: How do I reset the C0586 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, the code will return.
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.