1993 Oldsmobile 98 Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 1993 Oldsmobile 98

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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 1993 Oldsmobile 98 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 1993 Oldsmobile 98 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.

If the cruise control refuses to turn on at all, the actuator could be at fault. Likewise, if the cruise control stays on but does not maintain a consistent speed, the problem could be a bad actuator. In extreme cases, a malfunctioning actuator could cause the throttle to stick and prevent the vehicle from slowing down. These symptoms may point to a bad actuator. They may also point to other problems with the cruise control and related systems.

What are the initial steps to diagnose the non-functioning cruise control in a 1993 Oldsmobile 98?

To effectively diagnose the non-functioning cruise control in your 1993 Oldsmobile 98, start with the simplest components first. Begin by checking the fuse box for any blown fuses related to the cruise control system, as this is a quick and easy fix that can often resolve the issue. Next, inspect the cruise control switch located on the steering wheel to ensure it is operational; a malfunctioning switch can prevent the system from engaging. Following this, examine the brake pedal switch, which is crucial since the cruise control is designed to disengage when the brake is applied. If the switch is stuck or faulty, it could be the culprit behind the problem. Additionally, verify the functionality of the vehicle's speed sensors, as they provide essential data for the cruise control system to operate correctly. Lastly, take a close look at the cruise control module and its wiring for any visible signs of damage or wear, as these components can also lead to system failure. By systematically addressing these areas, you can effectively narrow down the cause of the cruise control malfunction and take the necessary steps to restore its functionality.

What are the common problems that could cause the cruise control to stop working in a 1993 Oldsmobile 98?

When troubleshooting the cruise control system in a 1993 Oldsmobile 98, it's essential to understand the common problems that may lead to its failure. One of the primary issues could be a malfunctioning control module, sensor, or switch, which are integral to the system's operation. Additionally, throttle actuation problems can disrupt the cruise control functionality, making it crucial to inspect the throttle body for any irregularities. Another frequent culprit is the vacuum actuator; if the vacuum hoses are damaged or if the actuator cable is faulty, the cruise control may cease to function properly. It's also wise to check for a blown fuse, as this can easily disable the system. Lastly, a defective brake pedal switch can interrupt the cruise control, so verifying its operation is a necessary step in the diagnostic process. By systematically addressing these potential issues, you can effectively identify and resolve the cruise control problems in your Oldsmobile 98.

How urgent is it to repair the non-functioning cruise control on a 1993 Oldsmobile 98?

Repairing the non-functioning cruise control on a 1993 Oldsmobile 98 is an urgent matter that should not be overlooked. The safety concerns associated with a malfunctioning cruise control system are significant; it can lead to unintended acceleration or deceleration, increasing the risk of accidents, particularly during long drives where driver fatigue is a factor. Additionally, the absence of cruise control can detract from driving comfort, forcing the driver to maintain constant speed manually, which can lead to quicker fatigue and discomfort on extended trips. Furthermore, a malfunctioning cruise control may signal deeper issues within the vehicle's electronic or engine control systems. By addressing this problem promptly, you not only enhance your safety and comfort but also prevent potential damage to other vehicle components, making timely repair a wise decision for any DIY enthusiast.

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1993 Oldsmobile 98 Cruise Control Malfunction Guide