2016 Mitsubishi Lancer Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2016 Mitsubishi Lancer: 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 2016 Mitsubishi Lancer 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 2016 Mitsubishi Lancer 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 2016 Mitsubishi Lancer?

When faced with a check engine light on your 2016 Mitsubishi Lancer, it's essential to approach the diagnosis methodically. Start by checking the gas cap; a loose or damaged cap is a common culprit that can easily trigger the light. Next, take a moment to review your dashboard gauges for any additional warning lights or unusual readings, as these can provide further insights into the problem. Utilizing an OBD-II scanner is a crucial step, as it allows you to retrieve specific error codes that can direct you to the underlying issue. After that, inspect the spark plugs for wear or damage, as they play a vital role in engine performance. Additionally, examine the vacuum hoses for any signs of cracks or leaks, which can lead to significant engine problems. Finally, ensure that all essential fluid levels—such as oil, coolant, and transmission fluid—are within the recommended range. By following these steps, you can effectively narrow down the cause of the check engine light and take appropriate action to resolve the issue.

What are the common problems that could cause the check engine light to illuminate in a 2016 Mitsubishi Lancer?

When the check engine light illuminates in a 2016 Mitsubishi Lancer, it signals that something may be amiss under the hood, prompting DIY enthusiasts to investigate. Common issues that can trigger this warning include a loose gas cap, which is a simple fix that can often be overlooked. A faulty oxygen sensor is another frequent offender, as it is vital for monitoring emissions and ensuring optimal fuel efficiency. Additionally, problems with the catalytic converter can lead to performance issues, while worn spark plugs may cause engine misfires, indicating a need for replacement. The mass airflow sensor is also crucial; if it malfunctions, it can disrupt the air-fuel mixture, leading to the check engine light activation. Ignition coil failures and engine misfires are further potential causes, often related to the ignition system. For those eager to resolve these issues independently, utilizing a diagnostic scan tool is essential, as it helps identify the specific problem, allowing for more targeted and effective repairs.

How urgent is it to address the check engine light in a 2016 Mitsubishi Lancer?

Addressing the check engine light in your 2016 Mitsubishi Lancer is not just a matter of convenience; it is a critical step in ensuring your vehicle's safety and longevity. Ignoring this warning can lead to a cascade of problems, from diminished engine performance to increased emissions, which can ultimately result in costly repairs. The check engine light often signals underlying issues that, if left unchecked, could escalate into severe engine damage or even compromise your vehicle's safety on the road. For DIY enthusiasts, it is essential to recognize that modern vehicles are equipped with sophisticated electronic systems that require prompt attention. By diagnosing and resolving the issue indicated by the check engine light, you not only enhance your car's efficiency but also prevent minor problems from evolving into major headaches. Therefore, taking immediate action when the check engine light illuminates is crucial for maintaining your Mitsubishi Lancer's performance and avoiding unnecessary expenses down the line.

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2016 Mitsubishi Lancer Check Engine Light Causes | RepairPal