Cadillac XT4 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Cadillac XT4 and How to Fix Them

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Reviewed by
Andrew Hajjar
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 Cadillac XT4 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 XT4 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.

Troubleshooting Cruise Control Issues in a Cadillac XT4

When troubleshooting cruise control issues in your Cadillac XT4, it's essential to adopt a methodical diagnostic approach. Begin by checking the fuse associated with the cruise control system, as a blown fuse is a common and easily fixable problem. Next, inspect the brake pedal switch; if it's defective, it can prevent the cruise control from engaging. If these initial checks do not resolve the issue, turn your attention to the throttle control system, as any malfunctions here can disrupt cruise control functionality. Additionally, consider the condition of the ABS, since issues within this system can also affect cruise control performance. For older models, a broken vacuum line may be a culprit, so inspect this component if applicable. If your XT4 features Adaptive Cruise Control, ensure you understand its operation, as improper use can lead to perceived malfunctions. By following this structured approach, you can effectively diagnose and potentially resolve cruise control issues before seeking professional assistance.

Troubleshooting Cruise Control Issues in a Cadillac XT4

When troubleshooting cruise control issues in your Cadillac XT4, it's essential to understand the common problems that may be affecting the system's performance. A blown fuse or a defective brake pedal switch is often the first culprit to investigate, as these components play a crucial role in the cruise control's operation. Additionally, issues with the throttle control system can disrupt the functionality, so checking for any malfunctions there is vital. The ABS system can also impact cruise control; therefore, ensuring that it is functioning correctly is important. In older models, a broken vacuum line may be a potential issue, although this is less common in newer vehicles. By systematically examining these components, you can effectively diagnose the problem. If you find that the cruise control still isn't working after checking these areas, it may be time to seek assistance from a professional mechanic or an authorized Cadillac service center for a more thorough evaluation.

Why is the Cruise Control Not Working in a Cadillac XT4?

When the cruise control in your Cadillac XT4 is not working, it’s crucial to address the problem promptly, as neglecting it could lead to safety risks or more significant vehicle damage. Common issues include a failed control module, faulty sensors, or malfunctioning switches, which can disrupt the system's operation. Additionally, a blown fuse or a defective brake pedal switch may prevent the cruise control from engaging. It's also important to consider the throttle control system and ABS, as problems in these areas can affect cruise control functionality. For those with older models, a broken vacuum line might be the culprit. Furthermore, obstructions in the forward-looking camera or radar sensors can hinder adaptive cruise control, especially in poor lighting or when following vehicles with unusual shapes. A damaged speed sensor can also cause erratic behavior, such as the cruise control shutting off unexpectedly. Remember, cruise control should not be used on slippery roads, and it typically does not operate below speeds of 40 km/h (25 mph). By addressing these issues quickly, you can ensure a safer driving experience and maintain the integrity of your vehicle's systems.

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