1990 Mitsubishi Van Tire Pressure Warning Light Stays On

Troubleshooting Tire Pressure Warning Light Issues in Your 1990 Mitsubishi Van: Causes and Solutions

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Tire Leaking Air
0%
30% chance it's the
Wheel Leaking Air
0%
15% chance it's the
Tire Pressure Monitoring System
0%
15% chance it's
Something else
The most common reasons a 1990 Mitsubishi Van tire pressure warning light stays on are a leaking tire, a wheel that no longer holds air, or a faulty tire pressure monitoring system.
  • Tire Leaking Air: A puncture, valve stem issue, or rim damage can cause a tire to leak air, leading to loss of pressure.
  • Wheel Leaking Air: A puncture or damage to the tire or rim can cause air to leak, resulting in a loss of tire pressure.
  • Tire Pressure Monitoring System: A malfunctioning tire pressure monitoring system can be caused by faulty sensors or a dead battery in the sensor units.
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 1990 Mitsubishi Van tire pressure warning light stays on?

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.

The only symptoms requiring diagnosis for the tire pressure monitoring system warning lamp is if the warning lamp has illuminated while the tires have correct air pressure, or if the air pressure for the tires is out of specification and the warning lamp is off. This is because the overwhelming majority of cases where the TPMS lamp illuminates is due to the change in ambient temperature.

What are the initial steps to diagnose a tire pressure warning light that stays on in a 1990 Mitsubishi Van?

To effectively diagnose a tire pressure warning light that remains illuminated in your 1990 Mitsubishi Van, begin with the most straightforward step: checking the tire pressure in all four tires using a reliable gauge. Ensure that the readings align with the manufacturer's specifications, which can typically be found in the owner's manual or on a label inside the driver's side door. Next, conduct a visual inspection of each tire for any signs of damage, such as cuts, punctures, or bulges, as these can lead to air loss and trigger the warning light. Don’t overlook the valve stems; ensure they are intact and free from leaks, as faulty stems can also contribute to pressure loss. To further investigate potential leaks, apply a mixture of soap and water around the valve stems and tire bead; any escaping air will create bubbles, indicating a leak. If all these checks are satisfactory, attempt to reset the tire pressure monitoring system as outlined in your vehicle's manual, as this can sometimes clear false warnings. By following these initial diagnostic steps, you can effectively address the tire pressure warning light issue, and if the problem persists, consider seeking professional assistance for a more thorough examination.

What could cause the tire pressure warning light to remain on in a 1990 Mitsubishi Van?

When the tire pressure warning light remains illuminated in a 1990 Mitsubishi Van, it can be attributed to several common issues that DIYers can investigate. First and foremost, low tire pressure is the most frequent culprit; checking and inflating all tires to the manufacturer's recommended levels is essential. If the tire pressure is adequate, the next step is to examine the tire pressure sensor, as a malfunctioning sensor can falsely indicate low pressure. Additionally, electrical issues within the system may cause the warning light to stay on, so inspecting the wiring and connections for any faults is advisable. In some cases, the tire pressure monitoring system may require recalibration to function correctly, which can often be done by following specific manufacturer guidelines. Lastly, it's crucial to inspect the tires for any visible damage, such as punctures or leaks, as these can also trigger the warning light. By systematically addressing these potential problems, you can effectively troubleshoot the tire pressure warning light issue in your Mitsubishi Van.

How urgent is it to address the tire pressure warning light that stays on in a 1990 Mitsubishi Van?

Addressing the tire pressure warning light in a 1990 Mitsubishi Van is not just a matter of convenience; it is a critical safety concern that requires immediate attention. When this warning light remains illuminated, it signals that the tire pressure may be below the recommended levels, which can severely compromise the vehicle's handling and braking capabilities. This increases the likelihood of accidents, particularly in emergency situations where quick response is essential. Furthermore, driving on underinflated tires can lead to uneven wear, significantly shortening their lifespan and raising the risk of a blowout while on the road. This not only endangers the driver and passengers but can also result in costly repairs. Additionally, low tire pressure negatively impacts fuel efficiency, leading to higher fuel costs over time. Therefore, it is imperative to check the tire pressure, inflate the tires to the correct specifications, and investigate any underlying issues with the tire or the monitoring system to ensure safe and efficient operation of the vehicle. Ignoring this warning light can lead to serious consequences, making prompt action essential for both safety and financial reasons.

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