2017 Kia Niro Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2017 Kia Niro: 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
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60% chance it's
Something else
The most common reasons a 2017 Kia Niro 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 2017 Kia Niro 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 2017 Kia Niro?

When faced with a check engine light on your 2017 Kia Niro, it's essential to adopt a systematic diagnostic approach to identify the underlying issue effectively. Start by checking the gas cap, as a loose or damaged cap is a common culprit that can easily trigger the warning light. Next, take a moment to inspect your dashboard gauges for any additional warning lights or unusual readings that might offer further insights into the problem. Utilizing an OBD-II scanner is a crucial step; this tool allows you to retrieve error codes from your vehicle's computer, providing specific information about the issue at hand. Additionally, a visual inspection under the hood can reveal any obvious signs of damage, such as frayed wires or loose hoses, which could be contributing to the check engine light. Finally, consulting your owner's manual can provide tailored guidance on the meaning of the check engine light for your Kia Niro and suggest appropriate actions. By following these initial steps, you can gather valuable information that will help you diagnose and address the issue effectively.

What are the common problems that could cause the check engine light to illuminate in a 2017 Kia Niro?

When the check engine light comes on in a 2017 Kia Niro, it can be a source of concern for any DIY car owner. One of the most straightforward issues to check is the gas cap; a loose or damaged cap can easily trigger the light, and simply tightening or replacing it may resolve the problem. If the light persists, consider inspecting the oxygen sensor, as a faulty sensor can significantly impact fuel efficiency and emissions. Additionally, problems with the catalytic converter, such as inefficiency or failure, can also cause the light to illuminate, indicating a need for further investigation. Spark plugs are another common culprit; worn or faulty plugs can lead to engine misfires, prompting the check engine light to activate. Furthermore, a malfunctioning mass airflow sensor can disrupt engine performance, while issues with the ignition coil can lead to similar performance problems. Lastly, don’t overlook the EGR valve, as a faulty valve can contribute to emissions issues. Addressing these common problems promptly is crucial to maintaining your vehicle's performance and preventing more serious damage, making it essential for DIY enthusiasts to stay informed and proactive.

How urgent is it to address the check engine light in a 2017 Kia Niro?

When the check engine light illuminates in your 2017 Kia Niro, it is crucial to understand the urgency of the situation. This warning light is not just a minor inconvenience; it indicates that your vehicle's engine or emissions system may be experiencing a malfunction. Ignoring this signal can lead to escalating problems, ranging from minor issues like a loose gas cap to more severe complications such as a failing oxygen sensor or engine damage. For DIY enthusiasts, while it may be tempting to dismiss the light or delay action, doing so can result in costly repairs and safety risks. Prolonged driving with the check engine light on can exacerbate existing issues, potentially leading to engine failure or other significant damage. Therefore, it is advisable to conduct a thorough diagnostic check as soon as possible, whether through an OBD-II scanner or by consulting a qualified mechanic, to identify and address the underlying problem effectively. Taking prompt action not only preserves the performance and reliability of your Kia Niro but also ensures your safety on the road.

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2017 Kia Niro Check Engine Light Causes & Solutions