2005 Cadillac CTS Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2005 Cadillac CTS 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 2005 Cadillac CTS 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 2005 Cadillac CTS 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.

What are the steps to diagnose the cruise control issue in a 2005 Cadillac CTS?

To effectively diagnose the cruise control issue in your 2005 Cadillac CTS, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by ensuring that the brake lights are functioning properly, as they play a crucial role in the cruise control system's operation. Next, inspect the cruise control button for any signs of damage or malfunction, ensuring it engages correctly when pressed. Utilizing a diagnostic scanner can help identify any error codes that may indicate specific problems within the cruise control system. Following this, examine the cruise control module for visible damage or loose connections that could hinder its performance. It's also important to test the cruise control switch to confirm it is sending the appropriate signals to the module. Lastly, check the cruise control fuse for any signs of being blown and replace it if necessary. If these steps do not resolve the issue, consulting a professional mechanic may be the best course of action for further diagnosis and repair. This methodical approach not only saves time but also helps in pinpointing the exact cause of the problem efficiently.

What are the common problems that could cause the cruise control to stop working in a 2005 Cadillac CTS?

When dealing with a malfunctioning cruise control system in a 2005 Cadillac CTS, it's essential to understand the common problems that could be at play. One of the primary culprits is a faulty brake light switch, which is crucial for the cruise control's operation; if this switch fails, it may prevent the system from engaging, as it is designed to deactivate when the brake pedal is pressed. Another potential issue is a defective speed sensor, which can disrupt the system's ability to maintain a steady speed, leading to erratic performance. Additionally, a blown fuse within the cruise control circuit can completely disable the system, making it vital to check the fuses if you encounter issues. Vacuum leaks in the engine can also affect the cruise control's functionality, as they can compromise the vacuum supply necessary for the system to operate correctly. Lastly, a malfunctioning cruise control module may be the root cause of the problem, as this component is responsible for controlling the entire system. By understanding these common issues, DIYers can effectively troubleshoot and potentially resolve the cruise control problems in their Cadillac CTS.

How urgent is it to address the non-functioning cruise control in a 2005 Cadillac CTS?

When it comes to the non-functioning cruise control in a 2005 Cadillac CTS, understanding the urgency of the situation is crucial for any DIY enthusiast. While a malfunctioning cruise control may not present an immediate safety risk like failing brakes or steering, it can signal deeper issues within the vehicle's electronic systems. Ignoring this problem could lead to further complications, potentially affecting other critical components and compromising overall vehicle safety. Moreover, a properly functioning cruise control system enhances driving comfort and fuel efficiency, making it an important feature for long trips. Therefore, it is advisable to inspect and address the cruise control issue promptly, either through DIY troubleshooting or by consulting a qualified mechanic, to ensure the vehicle remains safe and reliable on the road.

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