2005 Saab 9-5 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2005 Saab 9-5 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 2005 Saab 9-5 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 Saab 9-5 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.

What are the steps to diagnose the non-functioning cruise control in a 2005 Saab 9-5?

To effectively diagnose the non-functioning cruise control in your 2005 Saab 9-5, begin with the simplest checks to avoid unnecessary complications. Start by inspecting the cruise control fuse, as a blown fuse can easily disrupt the system's operation. Next, examine the cruise control buttons on the steering wheel to ensure they are not stuck or damaged, as this can prevent activation. Following this, check the speed sensors, which are vital for the cruise control to function correctly; any malfunction here could be the root of the issue. Utilizing a diagnostic scanner to scan for error codes can provide insights into any underlying problems that may not be immediately visible. Additionally, inspect the vacuum lines for leaks or damage, as these are crucial for the system's operation. Don’t forget to test the brake and clutch switches, as faulty switches can interfere with cruise control engagement. Finally, check the wiring connections for any loose or corroded connections that could be affecting functionality. By systematically following these steps, you can effectively identify and address the issue with your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2005 Saab 9-5?

When dealing with cruise control issues in a 2005 Saab 9-5, it's essential to understand the common problems that may arise. One frequent culprit is a faulty cruise control switch, which can hinder the system's ability to engage or disengage as intended. Additionally, a blown fuse can disrupt the electrical flow, rendering the cruise control inoperative. Vacuum leaks are another significant concern, as they can prevent the system from maintaining a consistent speed. Furthermore, a defective speed sensor may lead to inaccurate speed readings, adversely affecting cruise control performance. It's also important to check the brake light switch, as any malfunction here can prevent the cruise control from activating altogether. Lastly, issues with the throttle cable can interfere with the system's speed adjustments. By systematically addressing these potential problems, DIYers can effectively troubleshoot and restore functionality to the cruise control system in their Saab 9-5.

How urgent is it to repair the non-functioning cruise control in a 2005 Saab 9-5?

While the non-functioning cruise control in a 2005 Saab 9-5 may not seem like an urgent repair, it is essential to understand the implications of delaying the fix. Cruise control enhances driving comfort, particularly on long journeys, by allowing drivers to maintain a steady speed without constant pedal pressure, which can reduce fatigue. If the malfunction stems from minor issues like a blown fuse or a faulty brake pedal switch, these can be resolved easily and affordably, making it a low-priority repair. However, if the problem is linked to more complex systems such as the throttle control or ABS, neglecting the issue could lead to more significant complications down the line, potentially affecting vehicle performance and safety. Therefore, while it may not be an emergency, addressing the cruise control malfunction promptly is advisable to ensure a more enjoyable and safe driving experience.

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