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Engine-Codes – Generic – P0566

P0566 Code - Cruise Control Off Signal Malfunction

Quick Answer

The P0566 diagnostic trouble code (DTC) indicates a Cruise Control Off Signal Malfunction. Common causes include Faulty cruise control switches, Damaged wiring or connectors in the cruise control circuit, Malfunctioning cruise control module. 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
P0566 indicates Cruise Control Off Signal Malfunction.
Common causes
Common causes include Faulty cruise control switches, Damaged wiring or connectors in the cruise control circuit, Malfunctioning cruise control module.
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 Sep 13, 2024
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Code P0566 Description

The P0566 diagnostic trouble code (DTC) indicates a Cruise Control Off Signal Malfunction. This means that the vehicle's onboard computer has detected an issue with the cruise control system's ability to turn off properly. Cruise control is a feature that allows the driver to set a desired speed for the vehicle to maintain automatically, reducing the need to constantly adjust the throttle. When the cruise control off signal malfunctions, it can lead to the cruise control system not disengaging when the driver wants to turn it off, potentially causing unsafe driving conditions.

OBDII Code P0566 - Cruise Control Off Signal Malfunction
P0566 Code - Cruise Control Off Signal Malfunction

Common Causes of P0566

  1. Faulty cruise control switches
  2. Damaged wiring or connectors in the cruise control circuit
  3. Malfunctioning cruise control module
  4. Issues with the vehicle's powertrain control module (PCM)
  5. Electrical issues such as blown fuses or relays

Symptoms of P0566

  1. Inability to turn off cruise control
  2. Erratic speed control while cruise control is engaged
  3. Cruise control not engaging at all
  4. Illumination of the check engine light
  5. Possible loss of vehicle speed control functionality

How to Fix P0566

  1. Use a diagnostic scanner to retrieve the trouble code and identify the specific issue with the cruise control system.
  2. Inspect the cruise control switches, wiring, and connectors for any damage or corrosion. Repair or replace as needed.
  3. Test the cruise control module and powertrain control module for proper functionality. Replace if necessary.
  4. Clear the DTC from the vehicle's computer memory and test the cruise control system to ensure proper operation.
  5. If the issue persists, further diagnosis may be required to pinpoint the exact cause of the malfunction.

Cost to Fix P0566

The cost of repairing a Cruise Control Off Signal Malfunction (P0566) can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the repair costs for this type of problem can range from $100 to $300, including parts and labor. However, it's important to note that diagnostic time and labor rates can vary significantly based on factors such as location, vehicle make and model, and the expertise of the technician. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate for the repair.

When is the Code Detected?

The Engine Control Module (ECM) has detected a fault in the cruise control off switch circuit

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Code P0566 Information for Specific Makes

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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