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P0585 Jeep Code - Speed Control Switch Correlation Error

Quick Answer

The P0585 diagnostic trouble code (DTC) for Jeep vehicles refers to a speed control switch correlation error. Common causes include Faulty speed control switch: A damaged or malfunctioning speed control switch can send incorrect signals to the ECM, causing a correlation error, Wiring issues: Damaged or corroded wiring connections between the speed control switch and the ECM can disrupt communication and trigger the P0585 code, ECM malfunction: A faulty engine control module can also be a potential cause of the correlation error, as it may struggle to interpret the signals from the speed control switch correctly. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
P0585 Jeep indicates Speed Control Switch Correlation Error.
Common causes
Common causes include Faulty speed control switch: A damaged or malfunctioning speed control switch can send incorrect signals to the ECM, causing a correlation error, Wiring issues: Damaged or corroded wiring connections between the speed control switch and the ECM can disrupt communication and trigger the P0585 code, ECM malfunction: A faulty engine control module can also be a potential cause of the correlation error, as it may struggle to interpret the signals from the speed control switch correctly.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
What is this?
Table of contents Created and updated by William Orellana on Aug 18, 2024
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Code P0585 Jeep Description

The P0585 diagnostic trouble code (DTC) for Jeep vehicles refers to a speed control switch correlation error. This code is triggered when there is a discrepancy between the input signals from the speed control switch and the vehicle's engine control module (ECM). The speed control switch is responsible for activating and controlling the vehicle's cruise control system, allowing the driver to set and adjust their desired speed without having to constantly press the accelerator pedal. When a correlation error occurs, it can lead to issues with the cruise control system's functionality, potentially causing it to malfunction or become inoperative.

OBDII Code P0585 Jeep - Speed Control Switch Correlation Error
P0585 Jeep Code - Speed Control Switch Correlation Error

Common Causes of P0585 Jeep

  1. Faulty speed control switch: A damaged or malfunctioning speed control switch can send incorrect signals to the ECM, causing a correlation error.
  2. Wiring issues: Damaged or corroded wiring connections between the speed control switch and the ECM can disrupt communication and trigger the P0585 code.
  3. ECM malfunction: A faulty engine control module can also be a potential cause of the correlation error, as it may struggle to interpret the signals from the speed control switch correctly.
  4. Electrical problems: Issues with the vehicle's electrical system, such as a blown fuse or relay related to the cruise control circuit, can result in a P0585 code.

Symptoms of P0585 Jeep

  1. Inoperable cruise control system: The most common symptom associated with a P0585 code is the cruise control system not working properly or failing to engage at all.
  2. Check Engine Light: The illumination of the check engine light on the vehicle's dashboard may indicate a problem with the speed control switch correlation.
  3. Vehicle speed fluctuations: The vehicle may experience erratic speed fluctuations or difficulty maintaining a consistent speed while the cruise control is engaged.
  4. Hard shifting: The transmission may exhibit harsh or erratic shifting patterns due to the correlation error affecting the ECM's ability to communicate with the speed control switch.

How to Fix P0585 Jeep

  1. Diagnostic scan: Begin by using a diagnostic scan tool to retrieve the specific DTC (P0585) and identify the root cause of the correlation error.
  2. Inspect wiring and connections: Check the wiring harnesses and connections between the speed control switch and the ECM for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test speed control switch: Verify the functionality of the speed control switch by testing its operation and signal output. Replace the switch if it is found to be faulty.
  4. Check ECM: Perform a thorough inspection of the engine control module to ensure it is functioning correctly. If necessary, reprogram or replace the ECM to address any underlying issues.
  5. Clear codes and test drive: Once the repairs have been completed, clear the fault codes from the ECM memory and test drive the vehicle to confirm that the cruise control system is operating as intended.

Cost to Fix P0585 Jeep

The cost of repairing a P0585 speed control switch correlation error can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair can range from $50 to $200, while labor costs typically fall between $100 and $300. Overall, drivers can expect to pay anywhere from $150 to $500 for addressing a P0585 code at an auto repair shop. It's important to note that these estimates are approximate, and actual repair costs may differ based on factors such as location, vehicle make and model, and labor rates. Drivers are advised to consult with a certified mechanic or dealership for a more accurate cost estimate for their specific situation.

What does this mean?

Tech Notes for P0585 Jeep

This code can be set if two different control buttons in the cruise control system are press at the same time for more than 450 milliseconds. Since it is a logical problem and not a mechanical problem, try resetting the light first before replacing any parts.

When is the Code Detected?

The ECM compares the cruise control switch 1 to switch 2- A signal error was recognized

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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