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Code C0585

Quick reference

C0585 at a glance

Plain-language meaning
This code means there's a problem with the electric motor that helps you brake. It's like when a toy car's battery is too strong and makes it go too fast or not work right.
Urgency
High – Braking issues can affect vehicle safety and should be addressed immediately.
Difficulty
Moderate
System
Brake System Issue
Tools mentioned
OBD-II scanner, Multimeter, Wiring repair tools

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means there's a problem with the electric motor that helps you brake. It's like when a toy car's battery is too strong and makes it go too fast or not work right.

Explanation

The code indicates that the voltage in the circuit controlling the brake booster motor is too high.

Technical description

The C0585 code is triggered when the control module detects a high voltage condition in the U-V-W circuit of the Brake Booster Motor B. This circuit is responsible for controlling the electric motor that assists in applying the brakes.

Symptoms

• Increased braking effort

• Brake warning light on the dashboard

• Reduced braking performance

Common Causes

• Faulty brake booster motor

• Damaged wiring or connectors in the U-V-W circuit

• Faulty control module

Glossary

Brake Booster: A device that increases the force applied to the brake pedal.

U-V-W Circuit: A specific electrical circuit configuration used in motor control.

Diagnosis steps

• Check for any other related codes and clear them.

• Inspect the wiring and connectors in the U-V-W circuit for damage.

• Test the brake booster motor for proper operation.

Repair procedures

• Replace or repair damaged wiring or connectors.

• Replace the brake booster motor if faulty.

• Reprogram or replace the control module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Wiring repair tools

Estimated repair cost

$200 - $800

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Silverado

• GMC Sierra

• Cadillac Escalade

Preventive measures

• Regularly inspect brake system components.

• Ensure proper maintenance of electrical systems.

• Address any brake warning lights immediately.

Error code type

Brake System Issue

User experience recommendations

• Do not ignore the brake warning light.

• Have your vehicle inspected by a professional if you notice increased braking effort.

• Regularly check your vehicle's brake system.

Warranty information

Brake system components may be covered under a powertrain or bumper-to-bumper warranty. Check with your vehicle manufacturer.

Historical data

This code has been associated with vehicles using electric brake boosters, which have become more common in modern vehicles.

Urgency level

High – Braking issues can affect vehicle safety and should be addressed immediately.

Testing conditions

• Vehicle ignition on

• Brake pedal applied

Component location

The brake booster motor is typically located near the brake pedal assembly or under the hood, depending on the vehicle model.

FAQs

Q: Can I drive with the C0585 code?
A: It's not recommended to drive with this code as it affects the braking system, which is crucial for safety.

Q: How do I reset the C0585 code?
A: After fixing the issue, you can use an OBD-II scanner to clear the code. However, if the problem persists, the code will reappear.

Optional diagnostic gear

Tools that may help diagnose C0585

FOXWELL Multi-System Scanner diagnostic tool illustration

Pro · Four-system diagnostics

FOXWELL Multi-System Scanner

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
EPAuto 1/2" Torque Wrench diagnostic tool illustration

Universal · Torque wrench

EPAuto 1/2" 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
MaxxHaul Vehicle Ramps diagnostic tool illustration

Universal · Drive-on ramps

MaxxHaul Vehicle 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 Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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