2008 Cadillac CTS Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2008 Cadillac CTS 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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2008 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 2008 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.

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 cruise control issue in a 2008 Cadillac CTS?

When diagnosing a cruise control issue in a 2008 Cadillac CTS, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, examine the cruise control buttons on the steering wheel to ensure they are operational, since faulty buttons can lead to malfunctions. Utilizing an OBD-II scanner to check for error codes is a crucial step, as these codes can reveal specific problems within the cruise control system. Following this, inspect the vacuum lines for any leaks or damage, as a compromised vacuum system can hinder performance. Testing the cruise control module is also vital, as it must send and receive signals correctly to function properly. Lastly, ensure that the speed sensors are working effectively, as they play a critical role in maintaining a steady speed. By following this diagnostic approach, you can efficiently identify and address the root cause of the cruise control issue in your Cadillac CTS.

What are the common problems that could cause the cruise control to stop working in a 2008 Cadillac CTS?

When the cruise control in a 2008 Cadillac CTS ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the first things to check is the fuse associated with the cruise control system; a blown fuse can easily disrupt its operation. Additionally, the brake pedal switch plays a crucial role in the system's functionality; if this switch is faulty, it may prevent the cruise control from engaging. Another potential culprit is the vehicle's sensors, particularly the speed sensors, which can malfunction and lead to cruise control issues. Furthermore, inspect the switches within the cruise control system itself, as any faults here can also result in failure. Lastly, more complex problems may arise from the control module or Engine Control Module (ECM), which could require professional attention. By systematically checking these components, you can effectively troubleshoot and potentially resolve the cruise control issues in your Cadillac CTS.

How urgent is it to address the non-functioning cruise control in a 2008 Cadillac CTS?

When it comes to a non-functioning cruise control in a 2008 Cadillac CTS, understanding the urgency of the situation is crucial for any DIY enthusiast. While the immediate safety risks may not be apparent, neglecting this issue can lead to increased driver fatigue during long trips, as the convenience of maintaining a constant speed is lost. Furthermore, a malfunctioning cruise control system can indicate underlying problems within the vehicle's electrical or mechanical systems, which could escalate if left unaddressed. By taking the initiative to diagnose and repair the cruise control promptly, you not only enhance your driving comfort but also ensure that all vehicle systems are operating optimally. This proactive approach can prevent more significant issues down the line, making it a wise choice for anyone looking to maintain their vehicle's performance and safety.

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2008 Cadillac CTS Cruise Control Not Working | RepairPal