1991 Geo Metro Cruise Control Isn't Working

Diagnosing Common Issues with Cruise Control in Your 1991 Geo Metro 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 1991 Geo Metro 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 1991 Geo Metro 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.

What are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 1991 Geo Metro?

When troubleshooting the non-functioning cruise control in a 1991 Geo Metro, it's essential to adopt a systematic diagnostic approach. Begin by checking the fuse associated with the cruise control system, as a blown fuse is a common and easily fixable issue. Next, inspect the vacuum lines for any signs of leaks or damage, since these lines are crucial for the proper operation of the cruise control. If the vacuum lines appear intact, proceed to test the cruise control switch to ensure it is operational; a malfunctioning switch can prevent the system from engaging. Additionally, examine the speed sensor, as it plays a vital role in maintaining the desired speed; if it’s not functioning correctly, the cruise control will not work. Finally, if the previous steps do not reveal the problem, consider using a diagnostic scanner to check for any error codes that may indicate specific issues within the cruise control system. By following this structured approach, you can effectively identify and address the root cause of the cruise control malfunction in your Geo Metro.

What are the common problems that could cause the cruise control to stop working in a 1991 Geo Metro?

When dealing with cruise control issues in a 1991 Geo Metro, it's essential to understand the common problems that may arise. One frequent culprit is a blown fuse, which can easily be checked and replaced if necessary. Another potential issue is a faulty cruise control switch; if the switch is not functioning correctly, it may prevent the system from engaging or disengaging as intended. Additionally, vacuum leaks can disrupt the cruise control's operation, so inspecting the vacuum lines for any signs of wear or damage is crucial. A malfunctioning speed sensor can also lead to inaccurate speed readings, which directly impacts the cruise control's ability to maintain a set speed. Lastly, problems with the brake light switch can cause the cruise control to disengage unexpectedly, so ensuring this component is working properly is vital. By systematically checking these areas, DIYers can often identify and resolve the issues affecting their cruise control system.

How urgent is it to address the non-functioning cruise control in a 1991 Geo Metro?

When it comes to the non-functioning cruise control in your 1991 Geo Metro, understanding the urgency of the situation is crucial for both comfort and safety. While the cruise control system may not be essential for the basic operation of your vehicle, its malfunction can lead to significant inconveniences, particularly during long drives. Relying on manual speed control can become tiring and distracting, especially on highways where maintaining a constant speed is beneficial for reducing fatigue. Moreover, neglecting this issue could potentially escalate into safety concerns, as the driver may find it challenging to focus on the road while constantly adjusting speed. If you frequently use cruise control or have upcoming long trips, addressing the problem promptly is advisable to enhance your driving experience. Consulting a mechanic for a thorough inspection can help identify the root cause of the malfunction, ensuring that you can enjoy the convenience of cruise control without compromising safety or comfort on the road.

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