2017 Mazda MX-5 Miata Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2017 Mazda MX-5 Miata: Common Causes and Solutions

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Reviewed by
Devin Cabugcal
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 2017 Mazda MX-5 Miata 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 Mazda MX-5 Miata 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 Mazda MX-5 Miata?

When the check engine light illuminates on your 2017 Mazda MX-5 Miata, the first step is to check 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 unusual readings that might indicate a specific problem. If these initial checks do not resolve the issue, using an OBD-II scanner is a crucial step; this device connects to your vehicle's diagnostic port and retrieves error codes that can help identify the underlying problem. Once you have the error codes, refer to your owner's manual to interpret their meanings and explore potential solutions. If the problem remains unclear or requires more advanced diagnostics, it may be time to consult a professional mechanic. By following these steps, you can effectively narrow down the cause of the check engine light and take informed action to address it.

What are the common problems that could cause the check engine light to illuminate in a 2017 Mazda MX-5 Miata?

When the check engine light comes on in your 2017 Mazda MX-5 Miata, it can be concerning, but understanding the common problems can help you troubleshoot effectively. One of the simplest issues to check is the gas cap; a loose or damaged cap can easily trigger the light. If that’s not the culprit, consider the oxygen sensor, which monitors the air-fuel mixture and can fail over time, leading to increased emissions and reduced performance. Another critical component is the catalytic converter; if it’s malfunctioning, it can cause significant engine issues. Additionally, problems with spark plugs or ignition coils can disrupt engine performance, resulting in the check engine light illuminating. The mass airflow sensor, which measures the amount of air entering the engine, can also fail, affecting engine efficiency. Lastly, don’t overlook the exhaust gas recirculation (EGR) system, as a clogged valve can lead to emissions problems. Addressing these issues promptly not only helps in maintaining your vehicle’s performance but also prevents further damage, making it essential for any DIY enthusiast to be aware of these common triggers.

How urgent is it to address the check engine light in a 2017 Mazda MX-5 Miata?

When the check engine light illuminates in your 2017 Mazda MX-5 Miata, it is essential to recognize the urgency of the situation. This warning light is not merely a nuisance; it indicates that there may be underlying issues with your engine or emissions system that require immediate attention. Ignoring this signal can lead to more severe problems, such as decreased performance, reduced fuel efficiency, and even safety hazards on the road. For DIY enthusiasts, diagnosing the issue promptly can save you from costly repairs down the line and help maintain your vehicle's optimal performance. While it may not always signify an immediate emergency, taking the time to investigate the cause of the check engine light can prevent further damage and ensure that your Miata continues to run smoothly. Therefore, it is advisable to use an OBD-II scanner or consult a qualified mechanic to identify the problem as soon as possible, allowing you to address any necessary repairs and keep your car in top condition.

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2017 Mazda MX-5 Miata Check Engine Light: Causes & Solutions