Mitsubishi Outlander Has A Check Engine Light

Common Causes for the Check Engine Light in Your Mitsubishi Outlander and How to Resolve Them

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Reviewed by
Aisha
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 Mitsubishi Outlander 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 Mitsubishi Outlander 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.

Troubleshooting Check Engine Light in a Mitsubishi Outlander

When troubleshooting the check engine light in your Mitsubishi Outlander, it's essential to adopt a systematic diagnostic approach. Begin by checking the most common culprits, such as ensuring the gas cap is securely tightened, as a loose cap can often trigger the light. Next, inspect the condition of your spark plugs and ignition coils, as worn components can lead to misfires and irregular engine performance. If these initial checks do not resolve the issue, consider examining the mass airflow sensor and oxygen sensors, which can also contribute to engine problems. Once you've identified and addressed any potential issues, you can reset the check engine light using the INFO button method or by disconnecting the battery. After resetting, take your Outlander for a short drive to allow the vehicle's system to recalibrate and confirm that the problem has been resolved. By following this structured approach, you can effectively diagnose and address the check engine light concerns in your Mitsubishi Outlander, ensuring a smoother and more reliable driving experience.

What to Check When the Check Engine Light is On in a Mitsubishi Outlander?

When the Check Engine Light illuminates in your Mitsubishi Outlander, it can be a source of concern, but many issues are straightforward to diagnose and resolve. Start by inspecting the gas cap, as a loose or damaged cap is a frequent trigger for the warning light. Next, consider the sensors; both the oxygen and mass airflow sensors can malfunction and lead to engine performance issues. If you notice irregular engine running, the ignition cylinder may be at fault, warranting a closer look. Additionally, problems with the exhaust gas oxygen sensor can cause misfires, particularly during acceleration or at low speeds. If the Check Engine Light is flashing, this signals a more serious problem, such as a catastrophic misfire that could damage the catalytic converter. The On-Board Diagnostic system is designed to alert you to various engine, emission, or transmission issues, so it’s wise to check for any stored trouble codes. If you’re unable to pinpoint the issue after these checks, or if you observe symptoms like rough running or strange noises, it’s advisable to consult a professional technician for a thorough inspection. By addressing these common problems, you can take proactive steps to ensure your Outlander runs smoothly.

Why is the Check Engine Light Important in a Mitsubishi Outlander?

The Check Engine Light in your Mitsubishi Outlander is not just a minor inconvenience; it serves as a critical alert system for your vehicle's health. Ignoring this warning can lead to severe consequences, including safety risks and costly repairs. For instance, a simple issue like a loose gas cap can escalate into more significant engine problems if left unchecked. Additionally, the light can indicate serious malfunctions, such as a failing catalytic converter, which not only affects your vehicle's performance but can also lead to failed emissions tests, resulting in fines or the need for expensive repairs. Symptoms like decreased fuel efficiency or engine misfiring should never be overlooked, as they can signal underlying issues that, if neglected, may cause extensive damage to your engine or transmission. Therefore, addressing the Check Engine Light promptly is essential for maintaining your vehicle's performance, ensuring safety on the road, and avoiding unnecessary expenses down the line.

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