1995 Mitsubishi Eclipse Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 1995 Mitsubishi Eclipse: Common Causes and Solutions

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Emissions System
0%
60% chance it's
Something else
The most common reasons a 1995 Mitsubishi Eclipse has a check engine light are an emissions system component, a sensor, or a catalytic converter.
  • Emissions System: A faulty emissions system component, such as an oxygen sensor or EGR valve, can lead to increased emissions and trigger the check engine light.
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 1995 Mitsubishi Eclipse has a check engine light?

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.

A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

Due to the nature of electrical systems on modern vehicles, the range of problems these can cause are nearly limitless. However, there is a way to categorize them in two ways. Permanent and intermittent problems. Permanent problems appear and remain. This may be the vehicle will not start, the radio does not work, or the door chime will not turn off among many, many others. These problems are more straight-forward to diagnose since they present themselves at all time. This means there will always be a fault to find. Intermittent electrical problems, however, can be difficult or impossible to locate, since they appear then disappear without warning. The best case scenario for an intermittent issue is when replicating the problem is easily accomplished and understood. This allows a technician to make an issue semi-permanent, allowing them to find the fault. Other issues that come and go without warning and cannot be replicated on demand must occur when the technician is servicing the vehicle, otherwise there is no problem to correct. It is most important to understand that electrical system faults always require inspection, and can include the vehicle working in any manner, or not working at all.

Like we noted in the last section, general diagnosis symptoms are the most vague of the bunch. There are several diagnostic spectrums, electrical diagnosis, drivability diagnostics, engine diagnostics, transmission diagnostics, and the list could continue for about 5 or 10 more spectrums of diagnostics. The most important take-away here, is that general diagnostics are diagnostics that have no other spectrum in which they fit, or the problem is unknown. This means that any vehicle left outside of a repair facility with the keys and an authorization to perform diagnosis will be diagnosed under the general diagnosis spectrum.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

What are the initial diagnostic steps to take for a check engine light on a 1995 Mitsubishi Eclipse?

When faced with a check engine light on your 1995 Mitsubishi Eclipse, it's essential to approach the diagnosis methodically. Start by checking the gas cap; a loose or improperly sealed cap is a common and easily fixable issue that can trigger the light. If the gas cap is secure, the next step is to use an OBD-II scanner to retrieve any trouble codes from the vehicle's computer. These codes are invaluable as they pinpoint specific problems that need attention. Following this, inspect the spark plugs for wear or damage, as faulty plugs can significantly affect engine performance. Additionally, examine the mass airflow sensor for dirt or damage, as this component is crucial for optimal engine function. Don't overlook the oxygen sensor, which can also cause the check engine light to illuminate if it's malfunctioning. Lastly, check the catalytic converter for any signs of damage or clogging, as issues here can lead to serious performance problems. By following these steps in order, you can effectively diagnose and address the cause of the check engine light, potentially saving time and money on repairs.

What are the common problems that could cause the check engine light to activate in a 1995 Mitsubishi Eclipse?

When the check engine light illuminates in a 1995 Mitsubishi Eclipse, it often signals a range of potential issues that can be addressed with some basic automotive knowledge. One of the most frequent culprits is a faulty oxygen sensor, which can negatively impact fuel efficiency and emissions. Another common issue is a loose or damaged gas cap, which can lead to fuel evaporation and trigger the warning light. Additionally, problems with the catalytic converter, such as clogs or failures, can also cause the check engine light to activate. Ignition system components, including spark plugs and ignition coils, may also be at fault, as they are crucial for optimal engine performance. Furthermore, a malfunctioning mass airflow sensor can disrupt the air-fuel mixture, leading to the light turning on. Lastly, an engine misfire, often stemming from fuel system or timing issues, can be a significant factor. Addressing these problems promptly is essential for maintaining your vehicle's performance and preventing further damage, making it a worthwhile endeavor for any DIY mechanic.

How urgent is it to address the check engine light in a 1995 Mitsubishi Eclipse?

When the check engine light illuminates in your 1995 Mitsubishi Eclipse, it signals a need for immediate attention, as neglecting this warning can lead to serious repercussions. The light often indicates underlying issues with the engine or emissions system, which, if left unaddressed, can escalate into more significant problems, resulting in costly repairs. Additionally, ignoring the check engine light can adversely affect your vehicle's fuel efficiency and overall performance, potentially compromising your safety on the road. For DIY enthusiasts, it is crucial to recognize that while some issues may seem minor, they can quickly develop into major concerns if not diagnosed and resolved promptly. Therefore, taking the time to investigate the cause of the check engine light is essential not only for maintaining the health of your vehicle but also for ensuring a safe driving experience.

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