2015 Buick Regal Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2015 Buick Regal 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 2015 Buick Regal 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 2015 Buick Regal 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 non-functioning cruise control in a 2015 Buick Regal?

To effectively diagnose the non-functioning cruise control in your 2015 Buick Regal, begin with a methodical approach that emphasizes simplicity and accessibility. Start by checking the cruise control fuse, as a blown fuse is often the easiest and quickest fix. Next, inspect the cruise control buttons on the steering wheel to ensure they are not stuck or damaged, as this can directly affect functionality. Following this, examine the speed sensors, which are critical for the cruise control system to operate correctly. Utilizing an OBD-II scanner can provide valuable insights by revealing any error codes that may indicate underlying issues. Additionally, verify that the brake lights are functioning properly, since a malfunction here can inadvertently disengage the cruise control. If these initial checks do not resolve the problem, proceed to test the cruise control module to ensure it is sending the correct signals. Finally, inspect the wiring and connections for any signs of damage or corrosion that could disrupt the system. If all else fails, consulting a mechanic with experience in Buick vehicles may be necessary to further diagnose the issue. By following this structured diagnostic approach, you can efficiently troubleshoot and potentially resolve the cruise control malfunction in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2015 Buick Regal?

When troubleshooting cruise control issues in a 2015 Buick Regal, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty brake pedal switch, which can prevent the cruise control from engaging or disengaging as intended, since this switch is designed to deactivate the system when the brake is pressed. Additionally, speed sensor malfunctions can disrupt the cruise control's ability to maintain a constant speed, leading to operational failures. It's also wise to check for a blown fuse in the vehicle's electrical system, as this can interrupt the cruise control's functionality. Other potential issues include throttle control malfunctions, which may stem from a faulty throttle position sensor, and problems with the cruise control module itself, responsible for regulating the system. Furthermore, inspect the wiring for any damage or loose connections, as these can significantly impact performance. Lastly, be aware of any vehicle speed limiter features that might restrict cruise control operation above certain speeds. By systematically addressing these common issues, you can effectively diagnose and potentially resolve the cruise control problems in your Buick Regal.

How urgent is it to address the non-functioning cruise control in a 2015 Buick Regal?

When considering the urgency of fixing a non-functioning cruise control in a 2015 Buick Regal, it's essential to recognize that while it may not present an immediate safety hazard, the implications of neglecting this issue can be significant. A malfunctioning cruise control system can lead to increased driver fatigue during long trips, as it removes the convenience of maintaining a steady speed. Additionally, without this feature, drivers may experience frustration and discomfort, particularly on highways where consistent speed is beneficial. Ignoring the problem could also result in higher fuel consumption due to erratic speed control, ultimately affecting the vehicle's efficiency. Moreover, timely diagnosis and repair can prevent further complications within the vehicle's electrical system, ensuring that the cruise control operates effectively when needed. Therefore, while it may not be an emergency, addressing the cruise control issue promptly is advisable for maintaining overall driving comfort and vehicle performance.

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