2003 Lincoln Aviator Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2003 Lincoln Aviator 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 2003 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 2003 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 throttle position sensor fails, the engine's computer tends to overcompensate with fuel, leading black exhaust coming from the tailpipe. There is a strong possibility of engine misfires, and the check engine light will come on.

Throttle position sensors can also develop "dead spots," or certain places along the throttle curve where it doesn't get a reading. When this happens, the above symptoms can occur but then stop when you further press or let off the gas pedal.

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.

What are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2003 Lincoln Aviator?

When troubleshooting the non-functioning cruise control in a 2003 Lincoln Aviator, it's important to follow a methodical diagnostic approach that prioritizes simpler checks before delving into more complex issues. Begin by inspecting the cruise control fuse in the fuse box, as a blown fuse is a common culprit that can easily disrupt the system's operation. Next, assess the cruise control switch on the steering wheel; if this switch is faulty, it may prevent the cruise control from engaging properly. It's also essential to check the brake pedal switch, which is designed to deactivate the cruise control when the brake is pressed; a malfunctioning switch can lead to unexpected disengagement. Additionally, examine the vehicle speed sensor, as it is crucial for maintaining a consistent speed; any issues with this sensor can significantly impact cruise control functionality. Lastly, utilizing a diagnostic scanner to check for error codes can help identify specific problems within the cruise control system. By systematically addressing these areas, you can effectively troubleshoot and resolve the cruise control issues in your Lincoln Aviator.

What are the common problems that could cause the cruise control to stop working in a 2003 Lincoln Aviator?

When troubleshooting the cruise control system in a 2003 Lincoln Aviator, it's essential to understand the common problems that could lead to its failure. One of the primary culprits is a faulty brake pedal switch, which is crucial for disengaging the cruise control when the brake is applied. If this switch malfunctions, it can prevent the system from engaging properly. Another frequent issue is a defective speed sensor; this component is vital for maintaining a constant speed, and if it fails, the cruise control will not function as intended. Additionally, a blown fuse can completely disable the cruise control system, making it imperative to check the fuses if you experience issues. Vacuum leaks in the engine can also disrupt the system, as cruise control relies on vacuum pressure to operate effectively. Lastly, a malfunctioning cruise control module can prevent the system from engaging or maintaining speed. By identifying these common problems, you can take the first steps toward diagnosing and potentially fixing the cruise control issue in your Lincoln Aviator.

How urgent is it to repair the non-functioning cruise control in a 2003 Lincoln Aviator?

When it comes to the non-functioning cruise control in your 2003 Lincoln Aviator, understanding the urgency of the repair is crucial for both safety and convenience. Ignoring this issue can lead to more significant problems down the line, especially if the malfunction stems from critical components like blown fuses or faulty brake switches. These elements not only affect the cruise control system but can also compromise your vehicle's overall safety. For instance, a malfunctioning brake light can mislead other drivers, while a defective brake switch may prevent the cruise control from disengaging when needed, increasing the risk of accidents. Moreover, if the underlying cause is related to engine performance, neglecting the repair could lead to more extensive and costly damage. Therefore, addressing the cruise control issue promptly is not just about enhancing your driving experience; it’s about ensuring your safety and the safety of others on the road. Taking the time to diagnose and fix the problem can save you from potential hazards and provide peace of mind during your travels.

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2003 Lincoln Aviator Cruise Control Issues & Repair Costs