2004 Saab 9-5 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2004 Saab 9-5 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 2004 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 2004 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 2004 Saab 9-5?

To effectively diagnose the non-functioning cruise control in your 2004 Saab 9-5, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the fuse associated with the cruise control system, as a blown fuse is a common and easily fixable issue. Next, assess the cruise control switch to ensure it is operational; a malfunctioning switch can prevent the system from engaging. Following this, examine the brake pedal switch, which is essential for disengaging the cruise control when brakes are applied. If these components are functioning correctly, proceed to test the vehicle speed sensor, as it is crucial for the cruise control to receive accurate speed data. Additionally, inspect the throttle cable for any signs of wear or damage, as this can hinder the system's performance. Finally, utilize a diagnostic scanner to check for any error codes that may provide insight into underlying issues. By following this structured diagnostic approach, you can efficiently identify and resolve the problems affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2004 Saab 9-5?

When troubleshooting cruise control issues in a 2004 Saab 9-5, it's essential to consider several common problems that may be at play. One frequent culprit is the control module, which can fail and disrupt the entire system. Additionally, sensor or switch malfunctions can prevent the cruise control from engaging properly. Throttle actuation problems are another area to investigate, as they can hinder the system's ability to maintain speed. It's also important to check the vacuum actuator and its hoses, as damage or leaks can lead to a complete failure of the cruise control functionality. Furthermore, inspect the cable that connects the actuator to other components, as any wear or damage here can result in issues. Don't overlook the basics, such as a blown fuse or a defective brake pedal switch, both of which are common reasons for cruise control failure. Lastly, faulty wiring, particularly in the trunk area, can also impact the system's performance. By systematically examining these components, DIYers can effectively diagnose and potentially resolve cruise control problems in their Saab 9-5.

How urgent is it to address the non-functioning cruise control in a 2004 Saab 9-5?

When it comes to the non-functioning cruise control in a 2004 Saab 9-5, understanding the urgency of the situation is crucial for any DIY enthusiast. While a malfunctioning cruise control may not present an immediate safety hazard like failing brakes or steering, it can still signal underlying electrical issues that could compromise the vehicle's overall performance. Ignoring this problem could lead to more significant repairs down the line, potentially affecting other critical systems in your car. Therefore, it is advisable to address the issue promptly. By doing so, you not only restore the convenience of cruise control, which enhances driving comfort and fuel efficiency, but you also mitigate the risk of further complications that could arise from neglecting the problem. Taking the time to inspect and repair the cruise control system can ultimately contribute to the long-term safety and reliability of your vehicle.

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Troubleshooting 2004 Saab 9-5 Cruise Control Problems