Lincoln Nautilus Has A Check Engine Light

Common Causes for the Check Engine Light in Your Lincoln Nautilus and How to Resolve Them

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Reviewed by
Andrew Hajjar
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 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 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.

Troubleshooting Check Engine Light in a Lincoln Nautilus

When troubleshooting the check engine light in your Lincoln Nautilus, it's essential to adopt a systematic diagnostic approach. Start by checking for any obvious issues, such as loose gas caps or visible leaks, as these are often simple fixes that can resolve the light. Next, utilize an OBD-II scanner to retrieve any fault codes stored in the Engine Control Unit (ECU). This step is crucial, as it provides specific information about the underlying problem, whether it relates to the ignition system, emissions, or transmission. Once you have the codes, research their meanings to understand the potential causes. Address the identified issues, such as replacing a faulty oxygen sensor or fixing ignition cylinder problems, and then reset the check engine light by disconnecting the battery or using the scanner. After making repairs, drive the vehicle for a short distance to allow the ECU to recognize that the problem has been resolved. By following this methodical approach, you can effectively diagnose and troubleshoot the check engine light in your Lincoln Nautilus, ensuring your vehicle runs smoothly.

What Could Cause the Check Engine Light to Illuminate in a Lincoln Nautilus?

When the check engine light comes on in your Lincoln Nautilus, it can be a source of concern, but understanding the common problems can empower you to take action. One frequent culprit is a loose gas cap, which is an easy fix; simply tightening it may turn off the light. However, if the light is flashing, it indicates a more serious issue, such as a misfire that could damage the catalytic converter and oxygen sensors, necessitating immediate attention. Other potential causes include ignition cylinder problems that lead to irregular engine performance, or more complex issues detected by the vehicle's onboard computer. Ignoring the check engine light can lead to significant damage over time, so it's crucial to investigate the underlying cause promptly. By using an OBD-II scanner, you can retrieve the engine fault codes that will guide you in diagnosing the specific issue, allowing you to address it before it escalates into a more costly repair.

Why is the Check Engine Light On in a Lincoln Nautilus?

When the Check Engine Light illuminates in your Lincoln Nautilus, it is essential to understand that this warning is not to be taken lightly. Ignoring the light can lead to severe consequences, including significant engine damage or compromised vehicle safety. For instance, a flashing Check Engine Light often indicates a critical issue, such as a misfire that could damage the catalytic converter and other vital components. This not only affects your vehicle's performance but can also lead to costly repairs if left unaddressed. Additionally, problems like a faulty oxygen sensor can result in decreased fuel efficiency, further straining your budget. Therefore, it is crucial to retrieve the fault codes from the Engine Control Unit as soon as possible to diagnose the issue accurately. By addressing these symptoms promptly, you can prevent further damage and ensure your Lincoln Nautilus remains safe and reliable on the road.

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