2020 Kia Sedona Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2020 Kia Sedona: Common Causes and Solutions

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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 2020 Kia Sedona 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 Kia Sedona 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 2020 Kia Sedona?

When faced with a check engine light on your 2020 Kia Sedona, it's essential to adopt a systematic diagnostic approach. Begin by checking the gas cap, as a loose or damaged cap is a common and easily fixable issue that can trigger the light. Next, take a moment to observe the dashboard gauges for any additional warning lights or unusual readings, which may provide further insight into the problem. Pay attention to any other symptoms your vehicle may exhibit, such as strange noises or rough idling, as these can be critical clues. Utilizing an OBD-II scanner is a vital step in this process; it allows you to read the specific error codes that illuminate the check engine light, guiding you toward the underlying issue. Finally, consult your owner's manual for detailed information on the error codes and recommended actions. By following these initial steps, you can effectively narrow down the potential causes of the check engine light and take informed action to resolve the issue.

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

When the check engine light illuminates in a 2020 Kia Sedona, it signals potential issues that DIY enthusiasts can often troubleshoot. One of the most straightforward fixes is checking the gas cap; a loose or damaged cap can easily trigger the light and is simple to tighten or replace. More complex problems may involve the oxygen sensor, which, if malfunctioning, can lead to decreased fuel efficiency and increased emissions. Additionally, issues with the catalytic converter can cause the light to activate, often requiring more detailed diagnostics to identify the specific problem. Engine misfires, commonly caused by faulty spark plugs or ignition coils, are another frequent reason for the warning light. A malfunctioning mass airflow sensor can also disrupt the air-fuel mixture, impacting vehicle performance and triggering the check engine light. It's essential to address these issues promptly to maintain optimal vehicle performance and prevent further damage. If you're unsure about diagnosing these problems, seeking assistance from a qualified mechanic is advisable to ensure accurate repairs.

How urgent is it to address the check engine light in a 2020 Kia Sedona?

When the check engine light illuminates in your 2020 Kia Sedona, it signals a need for immediate attention, as neglecting this warning can lead to serious consequences. The light may indicate a range of issues, from minor sensor malfunctions to significant engine problems that could compromise your vehicle's performance and safety. Ignoring the light not only risks decreased fuel efficiency but can also result in costly repairs if the underlying issues worsen over time. For DIY enthusiasts, it’s essential to understand that while some problems may be simple fixes, others require professional diagnostics to prevent further damage. Therefore, it is advisable to use an OBD-II scanner to retrieve diagnostic trouble codes, which can guide you in identifying the issue. However, if the codes suggest a more complex problem, seeking the expertise of a qualified mechanic is crucial to ensure your vehicle remains safe and reliable on the road. Addressing the check engine light promptly not only protects your investment but also enhances your driving experience.

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