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Code P0585

Quick reference

P0585 at a glance

Plain-language meaning
This code means that the car's computer found a problem with the buttons or switches that control the cruise control. It's like when your TV remote doesn't work right because some buttons are not doing what they should.
Urgency
Moderate – While it doesn't affect the basic operation of the vehicle, it should be addressed to ensure cruise control functionality.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Screwdriver set

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

Laymans terms

This code means that the car's computer found a problem with the buttons or switches that control the cruise control. It's like when your TV remote doesn't work right because some buttons are not doing what they should.

Explanation

The engine control module (ECM) detects a mismatch between the signals from the cruise control multi-function inputs.

Technical description

The P0585 code is triggered when the ECM receives conflicting or out-of-range signals from the cruise control multi-function switches. These switches are responsible for various cruise control operations, such as setting speed, accelerating, decelerating, and canceling cruise control. The ECM expects these inputs to correlate correctly, and any discrepancy will set this code.

Symptoms

• Cruise control not working

• Cruise control disengages unexpectedly

• Check engine light illuminated

Common Causes

• Faulty cruise control switch

• Wiring issues or poor connections

• Faulty ECM

Glossary

ECM: Engine Control Module, the computer that manages engine functions.

Cruise Control: A system that automatically controls the speed of a vehicle.

Diagnosis steps

• Check for any other related codes.

• Inspect the cruise control switches for damage.

• Test the wiring and connections for continuity.

Repair procedures

• Replace the faulty cruise control switch.

• Repair or replace damaged wiring or connectors.

• Reprogram or replace the ECM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Screwdriver set

Estimated repair cost

$100 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regularly inspect cruise control switches for wear.

• Ensure wiring is not exposed to moisture.

• Perform routine vehicle diagnostics.

Error code type

Sensor Issue

User experience recommendations

• Avoid using cruise control until the issue is resolved.

• Consult a professional mechanic for diagnosis.

Warranty information

Check with your vehicle manufacturer for warranty coverage on electrical components.

Historical data

This code has been reported in vehicles with high mileage, often due to wear and tear on the cruise control switches.

Urgency level

Moderate – While it doesn't affect the basic operation of the vehicle, it should be addressed to ensure cruise control functionality.

Testing conditions

• Vehicle in motion

• Cruise control engaged

Component location

The cruise control switches are typically located on the steering wheel or steering column.

FAQs

Q: Can I still drive my car with this code?
A: Yes, but you should avoid using cruise control until the issue is fixed.

Q: Will this code cause my car to fail emissions testing?
A: No, this code is related to the cruise control system and not emissions.

Optional diagnostic gear

Tools that may help diagnose P0585

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.

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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.

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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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