2017 Fiat 124 Spider Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2017 Fiat 124 Spider: Common Causes and Solutions

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Reviewed by
Bo Fader
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 Fiat 124 Spider 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 Fiat 124 Spider 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 steps to diagnose the check engine light issue in a 2017 Fiat 124 Spider?

When diagnosing the check engine light issue in a 2017 Fiat 124 Spider, it's crucial to follow a methodical diagnostic approach that prioritizes simpler solutions before delving into more complex assessments. Begin by visually inspecting the vehicle for any obvious issues, such as a loose or damaged gas cap, which is a frequent cause of the check engine light activation. If the gas cap is secure, the next step involves using an OBD-II scanner to connect to the vehicle's diagnostic port. This device will allow you to retrieve the specific error code that triggered the check engine light, serving as a vital clue in your troubleshooting process. After obtaining the error code, take the time to research its meaning and potential causes, focusing on those that pertain specifically to the Fiat 124 Spider. This information will help you narrow down the possible issues. Subsequently, inspect relevant sensors and components, such as the oxygen sensor or mass airflow sensor, for any signs of wear or malfunction. If these initial steps do not resolve the issue, it may be prudent to consult a qualified mechanic or dealership, as they have the expertise and tools necessary to diagnose and repair more intricate engine problems. By adhering to this structured approach, you can effectively identify and address the check engine light issue, ensuring your Fiat 124 Spider operates efficiently.

What are the common problems that could cause the check engine light to illuminate in a 2017 Fiat 124 Spider?

When the check engine light comes on in a 2017 Fiat 124 Spider, it can be a source of concern for any DIY enthusiast. One of the first things to check is the gas cap; a loose or damaged cap is often the simplest fix and can be resolved by ensuring it is tightened properly. If the light persists, consider inspecting the oxygen sensor, as a faulty one can lead to poor fuel efficiency and increased emissions, which are easily diagnosed with an OBD-II scanner. Additionally, issues with the catalytic converter can trigger the light, indicating a need for further inspection of this critical component responsible for reducing harmful emissions. Spark plugs should also be examined, as worn or faulty plugs can significantly affect engine performance. Lastly, a malfunctioning mass airflow sensor can disrupt the engine's air-fuel mixture, leading to performance issues and the illumination of the check engine light. By addressing these common problems promptly, DIYers can maintain the performance and reliability of their Fiat 124 Spider while potentially saving on repair costs.

How urgent is it to address the check engine light in a 2017 Fiat 124 Spider?

When the check engine light illuminates in your 2017 Fiat 124 Spider, it is essential to recognize the urgency of the situation. This warning light is not just a minor inconvenience; it indicates that there may be a significant issue with your vehicle's engine or emissions system. Ignoring this alert can lead to more severe problems, including potential engine damage or increased emissions, which could result in costly repairs down the line. For DIY enthusiasts, the first step is to use an OBD-II scanner to retrieve diagnostic trouble codes (DTCs) that can help identify the underlying issue. While some problems may be minor and easily fixable, others could pose safety risks or lead to further complications if left unaddressed. Therefore, even if you are inclined to tackle repairs yourself, it is wise to consult a qualified mechanic for a thorough inspection to ensure that any issues are accurately diagnosed and resolved. Taking prompt action not only preserves the performance and reliability of your Fiat but also enhances your overall driving experience.

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