1998 Saturn SL Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 1998 Saturn SL 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 1998 Saturn SL 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 1998 Saturn SL 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 throttle position sensor fails, the engine's computer tends to overcompensate with fuel, leading black exhaust coming from the tailpipe. There is a strong possibility of engine misfires, and the check engine light will come on.

Throttle position sensors can also develop "dead spots," or certain places along the throttle curve where it doesn't get a reading. When this happens, the above symptoms can occur but then stop when you further press or let off the gas pedal.

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.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

What are the steps to diagnose the non-functioning cruise control in a 1998 Saturn SL?

To effectively diagnose the non-functioning cruise control in a 1998 Saturn SL, start with a systematic approach that prioritizes simpler checks before delving into more complex issues. Begin by inspecting the fuse associated with the cruise control system, as a blown fuse is a common and easily fixable problem. Next, examine the cruise control switch located on the steering wheel; ensure it is operational, as a faulty switch can prevent engagement. Following this, check the brake pedal switch, which is crucial for the system's functionality, since it disengages the cruise control when the brake is applied. If these components are functioning correctly, turn your attention to the speed sensor, as it is vital for the cruise control to operate effectively. Lastly, inspect the vacuum lines for any leaks or damage, as these can significantly impact performance in older vehicles. If all these checks do not resolve the issue, consulting a mechanic may be necessary for a more thorough diagnosis, as they possess the expertise to identify complex problems that may not be immediately apparent. By following this structured diagnostic approach, you can efficiently identify and address the issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 1998 Saturn SL?

When dealing with cruise control issues in a 1998 Saturn SL, several common problems may be at play. One of the first things to check is the fuse associated with the cruise control system; a blown fuse can easily disrupt its functionality. Additionally, the brake pedal switch is crucial, as it disengages the cruise control when the brake is applied; if this switch is faulty, it may prevent the system from engaging altogether. Another potential issue is vacuum leaks within the cruise control system, which can lead to a loss of necessary vacuum pressure, ultimately affecting performance. Furthermore, a malfunctioning speed sensor can hinder the cruise control's ability to maintain a consistent speed, while a defective cruise control module can also be a significant factor in system failure. By systematically diagnosing these components, DIYers can effectively identify and resolve the underlying issues affecting the cruise control in their Saturn SL.

How urgent is it to address the non-functioning cruise control in a 1998 Saturn SL?

When it comes to the non-functioning cruise control in a 1998 Saturn SL, understanding the urgency of the situation is crucial for any DIY enthusiast. While this issue may not present an immediate safety hazard like malfunctioning brakes or engine problems, it can still significantly affect your driving experience. A malfunctioning cruise control system can lead to increased driver fatigue during long trips, as maintaining a constant speed becomes a manual task. Moreover, neglecting this issue could result in further complications within the cruise control system, potentially leading to more extensive repairs down the line. Therefore, while it may not be an emergency, addressing the non-functioning cruise control promptly is advisable to enhance your comfort and ensure that the system is ready for use when needed. Taking action now can prevent minor inconveniences from escalating into more significant problems, making it a worthwhile DIY project for any Saturn SL owner.

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1998 Saturn SL Cruise Control Issues & Repair Guide