Cadillac XLR Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Cadillac XLR and How to Fix Them

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a Cadillac XLR 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 Cadillac XLR 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.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

Troubleshooting Cruise Control Issues in a Cadillac XLR

When troubleshooting cruise control issues in your Cadillac XLR, begin with the most straightforward checks to save time and effort. Start by inspecting the fuse associated with the cruise control system, as a blown fuse is a common and easily fixable problem. If the fuse is intact, move on to the brake light and brake switch; these components must function correctly for the cruise control to operate. If you notice any issues with the brake lights or switch, addressing these can often resolve the malfunction. Next, consider any engine-related problems that may be indicated by a check engine light, as these can directly impact the cruise control system. If the basics check out, focus on the cruise control sensor, which may require cleaning or replacement if it’s malfunctioning. Finally, if all else fails, the cruise control module itself might need to be examined or replaced. If you find yourself unable to diagnose the issue after these steps, consulting a professional mechanic with experience in Cadillac systems is a wise choice. By following this diagnostic approach, you can systematically address the cruise control issues in your Cadillac XLR, potentially restoring its functionality without extensive repairs.

Troubleshooting Cruise Control Issues in a Cadillac XLR

When troubleshooting cruise control issues in a Cadillac XLR, it's important to recognize the common problems that can affect the system's performance. Start by checking for a blown fuse, as this is often a primary reason for cruise control failure. Next, inspect the brake light and brake switch, since any malfunction in these components can disrupt the cruise control's functionality. Additionally, be aware that engine-related issues, such as a check engine light, can prevent the cruise control from operating correctly, so addressing these problems is crucial. If the system remains unresponsive, consider cleaning or replacing the cruise control sensor, as dirt or damage can significantly impair its performance. In some instances, the cruise control module may be faulty, requiring replacement to restore proper operation. For models equipped with radar cruise control, ensure that the radar sensor is correctly aligned, as misalignment can hinder its effectiveness. Lastly, keep in mind that the Adaptive Cruise Control unit is located below the bumper on the driver side, which is a common misconception. By methodically addressing these potential issues, you can effectively diagnose and resolve cruise control problems in your Cadillac XLR.

Why is the Cruise Control Not Working in a Cadillac XLR?

When the cruise control in your Cadillac XLR fails to operate, it’s crucial to address the issue promptly to avoid potential safety risks and further vehicle damage. Common causes include a malfunctioning control module, faulty sensors, or defective switches, which can disrupt the system's functionality. Additionally, throttle actuation problems, particularly with the throttle position sensor, may lead to erratic engine behavior, such as excessive fuel consumption and black exhaust, indicating that the engine's computer is struggling to maintain proper operation. Other factors like blown fuses, a defective brake pedal switch, or issues within the throttle control system can also contribute to cruise control failure. Ignoring these symptoms not only compromises your driving experience but can also lead to more significant mechanical issues down the line. Therefore, it’s advisable to conduct a thorough inspection of these components to ensure your cruise control system is functioning safely and effectively.

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Cadillac XLR Cruise Control Issues: Causes & Repairs