2021 Lincoln Aviator Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2021 Lincoln Aviator

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

To effectively diagnose a cruise control issue in a 2021 Lincoln Aviator, it's essential to adopt a systematic approach that begins with simpler checks before progressing to more complex diagnostics. Start by inspecting the cruise control fuse, as a blown fuse can easily disrupt functionality. Next, examine the cruise control buttons on the steering wheel to ensure they are operational, since faulty buttons can lead to engagement problems. Utilizing an OBD-II scanner to check for error codes is a crucial step, as these codes can pinpoint specific issues within the cruise control system. Following this, verify the functionality of the vehicle's speed sensors, which are essential for the cruise control to operate correctly. Additionally, inspect the wiring connections associated with the cruise control system for any signs of damage or corrosion, as poor connections can hinder performance. If these preliminary checks do not reveal the problem, proceed to test the cruise control module itself, as a malfunctioning module can prevent the system from engaging. Should you still be unable to identify the issue, it may be wise to consult a professional mechanic or dealership for further assistance. By following this structured diagnostic approach, you can efficiently troubleshoot and potentially resolve cruise control issues in your Lincoln Aviator.

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

When troubleshooting the cruise control system in a 2021 Lincoln Aviator, it's essential to understand the common problems that may lead to its failure. One prevalent issue is faulty speed sensors, which can hinder the system's ability to accurately gauge the vehicle's speed, resulting in malfunction. Additionally, a malfunctioning brake light switch can disrupt the cruise control, as it is designed to deactivate when the brakes are engaged. Another potential culprit is a blown fuse related to the cruise control system; replacing this fuse can often restore functionality. Furthermore, problems with the throttle control can prevent the cruise control from maintaining a steady speed, while issues with the Electronic Control Module (ECM) may require diagnostic testing and possible replacement to resolve the problem. By identifying these common issues, DIY enthusiasts can better assess the situation and determine whether a simple fix or professional assistance is needed.

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

Addressing a malfunctioning cruise control in a 2021 Lincoln Aviator is of utmost importance due to the significant safety risks it poses. A faulty system can lead to unexpected acceleration or deceleration, which can result in dangerous driving situations. Promptly fixing this issue not only enhances your safety on the road but also helps prevent potential accidents that could arise from a malfunctioning system. Additionally, delaying repairs may lead to further damage to the vehicle's components, resulting in more extensive and costly repairs down the line. Beyond safety and financial implications, a malfunctioning cruise control detracts from the overall driving experience, making it inconvenient to use this feature. Therefore, it is crucial to address any cruise control issues as soon as they arise to ensure a safe, enjoyable, and efficient driving experience in your Lincoln Aviator.

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