2021 Lincoln Navigator Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2021 Lincoln Navigator

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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 2021 Lincoln Navigator 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 2021 Lincoln Navigator 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.

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 steps to diagnose the cruise control issue in a 2021 Lincoln Navigator?

To effectively diagnose a cruise control issue in a 2021 Lincoln Navigator, it's essential to adopt a systematic approach that begins with the simplest checks before progressing to more complex diagnostics. Start by examining the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, since faulty buttons can lead to engagement problems. Utilizing a diagnostic scanner to check for error codes is a crucial step, as it can reveal specific issues within the cruise control system. Following this, verify the speed sensors, which are vital for the cruise control's performance; any malfunction here can significantly impact its operation. Additionally, inspect the wiring connections associated with the cruise control system for any signs of damage or loose connections, as these can hinder communication between components. Finally, test the cruise control module itself to confirm it is functioning correctly, as a defective module can prevent the system from engaging or maintaining speed. By following this structured diagnostic approach, you can efficiently identify and address the underlying issues affecting the cruise control in your Lincoln Navigator.

What are the common problems that could cause the cruise control to stop working in a 2021 Lincoln Navigator?

When troubleshooting the cruise control system in a 2021 Lincoln Navigator, it's essential to consider several common issues that may be at play. One of the primary culprits could be faulty speed sensors, which are crucial for the system to accurately gauge the vehicle's speed. If these sensors are malfunctioning, the cruise control may not engage or maintain speed effectively. Another potential issue is a malfunctioning brake light switch; since this switch is designed to deactivate cruise control when the brakes are applied, any faults here can lead to unexpected disengagement. Additionally, blown fuses related to the cruise control system can interrupt its functionality, making it necessary to check and replace any damaged fuses. Problems with the throttle control system can also hinder the cruise control's ability to maintain a steady speed, so inspecting this component is advisable. Lastly, issues with the electronic control module, which oversees various vehicle functions including cruise control, can lead to system failures. By systematically checking these components, DIYers can identify and potentially resolve the issues affecting their cruise control system.

How urgent is it to address the malfunctioning cruise control in a 2021 Lincoln Navigator?

Addressing a malfunctioning cruise control in a 2021 Lincoln Navigator is of utmost importance due to the immediate safety risks it poses. A malfunction can lead to unexpected acceleration or deceleration, which can create hazardous driving conditions for both the driver and others on the road. Additionally, a properly functioning cruise control system enhances the overall driving experience, providing convenience during long trips. Neglecting this issue not only compromises safety but can also lead to further complications within the vehicle's systems, resulting in more extensive and expensive repairs. Therefore, it is crucial to prioritize the diagnosis and repair of cruise control problems to ensure safe and enjoyable driving.

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2021 Lincoln Navigator Cruise Control Issues & Repair Guide