2015 Ford Flex Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2015 Ford Flex and How to Fix Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2015 Ford Flex cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2015 Ford Flex cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 2015 Ford Flex?

When troubleshooting the non-functional cruise control in your 2015 Ford Flex, start with the simplest checks to avoid unnecessary complexity. Begin by inspecting the fuses associated with the cruise control system, as a blown fuse can easily disrupt functionality. Next, examine the brake pedal and throttle body; any issues here can directly impact the cruise control's operation. If the check engine light is illuminated, it’s crucial to use an OBD2 scan tool to identify any underlying issues that may be affecting the system. Additionally, inspect the vacuum lines connected to the intake and brake booster for leaks, as these can prevent the cruise control from working properly. By following this structured approach, you can effectively diagnose and potentially resolve the cruise control issues in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2015 Ford Flex?

When troubleshooting the cruise control system in a 2015 Ford Flex, it's essential to consider several common problems that could be at play. One of the primary culprits is a faulty brake pedal switch, which is designed to disengage the cruise control when the brake is applied; if this switch malfunctions, it can prevent the system from engaging. Additionally, issues with the speed sensor can disrupt the cruise control's ability to maintain a steady speed, as the system relies on accurate speed readings to function correctly. Another potential issue is a blown fuse within the cruise control circuit, which can easily be checked and replaced if necessary. Furthermore, a malfunction in the throttle control system can hinder the cruise control's operation, making it difficult for the system to engage or disengage as intended. Problems with the Electronic Control Module (ECM) can also affect the cruise control, as this component manages various vehicle functions, including cruise control. Lastly, vacuum leaks in the engine can interfere with the cruise control system's performance, so inspecting for and repairing any leaks is crucial. By systematically addressing these common issues, you can effectively troubleshoot and potentially resolve the cruise control problems in your Ford Flex.

How urgent is it to address the malfunctioning cruise control in a 2015 Ford Flex?

Addressing a malfunctioning cruise control in a 2015 Ford Flex is not just a matter of convenience; it is a critical safety concern that should be prioritized. When cruise control fails, it can lead to erratic speed control, increasing the risk of accidents, especially during long drives where maintaining a steady speed is essential. Moreover, neglecting this issue can exacerbate underlying problems within the vehicle's electrical system, potentially leading to more extensive and costly repairs down the line. Therefore, it is imperative to act swiftly when symptoms of cruise control malfunction arise. By doing so, you not only enhance your driving experience but also safeguard the well-being of all passengers in the vehicle. Taking prompt action can prevent minor issues from escalating into significant safety hazards, making it essential to address any cruise control problems as soon as they are detected.

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