2020 Lincoln Nautilus Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2020 Lincoln Nautilus: Common Causes and Solutions

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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 2020 Lincoln Nautilus 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 2020 Lincoln Nautilus 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 first steps to diagnose the check engine light on a 2020 Lincoln Nautilus?

When faced with a check engine light on your 2020 Lincoln Nautilus, the first step is to conduct a thorough visual inspection. Start by checking the gas cap; ensure it is securely tightened and free from damage, as a faulty gas cap is a common culprit for triggering the light. If the gas cap appears fine, the next step involves utilizing an OBD-II scanner, which can be easily connected to the vehicle's OBD port. This tool will help you retrieve the specific error code associated with the check engine light, providing crucial insights into the underlying issue. Once you have the error code, take the time to research its meaning, either through the vehicle's manual or reputable online resources, to better understand the problem at hand. Additionally, pay attention to any other warning lights on the dashboard, as they may offer further context regarding the vehicle's condition. If these initial steps do not lead to a clear diagnosis or if the problem seems complex, it may be wise to consult a professional mechanic for a more in-depth analysis. By following this structured approach, you can effectively begin diagnosing the check engine light issue and potentially save on repair costs.

What are the common problems that could cause the check engine light to illuminate in a 2020 Lincoln Nautilus?

When the check engine light comes on in a 2020 Lincoln Nautilus, it can signal a range of common issues that DIY enthusiasts can investigate. One of the first things to check is the gas cap; a loose or damaged cap is often the simplest fix and can easily trigger the light. If the gas cap is secure, consider examining the oxygen sensor, as a faulty sensor can lead to reduced fuel efficiency and increased emissions. Additionally, problems with the catalytic converter, such as blockages or failures, can also illuminate the check engine light, indicating a need for further inspection. Spark plugs and ignition coils are other critical components to assess; worn or malfunctioning spark plugs can cause engine misfires, while faulty ignition coils can lead to similar issues. Lastly, the mass airflow sensor plays a vital role in maintaining the correct air-fuel mixture, and any malfunction here can also trigger the warning light. Addressing these common problems promptly not only helps in resolving the check engine light but also ensures the vehicle operates efficiently and reliably.

How urgent is it to address the check engine light in a 2020 Lincoln Nautilus?

When the check engine light illuminates in your 2020 Lincoln Nautilus, it is crucial to take immediate action rather than dismissing it as a minor inconvenience. This warning light is your vehicle's way of communicating that there may be underlying issues affecting its engine or emissions system. Ignoring this signal can lead to more severe problems, including costly repairs and diminished vehicle performance. For instance, a seemingly trivial issue could escalate into significant engine damage, resulting in extensive downtime and financial strain. Additionally, unresolved problems can negatively impact fuel efficiency and increase harmful emissions, which not only affects your wallet but also the environment. By promptly diagnosing the cause of the check engine light through DIY methods or professional diagnostic tools, you can address the issue before it worsens, ensuring your Lincoln Nautilus remains reliable and efficient on the road. Taking swift action not only preserves the integrity of your vehicle but also enhances your driving experience, making it essential to prioritize this warning light.

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