2017 Kia Forte5 Smells Like Gas

Identifying the Causes of Gas Smells in Your 2017 Kia Forte5 and Essential Safety Measures to Take

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
15% chance it's the
Gas Cap
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40% chance it's the
Emissions Control System
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45% chance it's
Something else
The most common reasons a 2017 Kia Forte5 smells like gas are the gas cap, the fuel system, or the emissions control system.
  • Gas Cap: A loose or damaged gas cap can cause fuel vapors to escape, triggering the check engine light and potentially affecting fuel efficiency.
  • Emissions Control System: A faulty emissions control system can lead to increased hydrocarbon emissions and trigger the check engine light due to malfunctioning components like the EGR valve or O2 sensors.
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 Forte5 smells like gas?

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 failing catalytic converter can cause a vehicle to fail emissions tests and turn on the check engine light. The exhaust might have an unusual smell. A restricted catalytic converter can result in a loss of engine power.

» LEARN MORE: How to tell if your catalytic converter is failing

The check engine light will illuminate any time there is a failed EVAP system test. This will be indicated by the various on-board diagnostics trouble codes that are stored in the vehicle's memory. Also, in some models, there may be a popping sound accompanying the check engine light, as the leak detection pump continuously attempts to pressurize the fuel tank. The canister may also cause difficulty starting the engine, a rough idle, and poor fuel mileage.

When the fuel filter begins to clog, the engine suffers from fuel starvation. This will cause a significant reduction in power and may also cause a misfire. These conditions may be intermittent, or constant and worsen over time. As the issue progresses, the engine may being to stall immediately after starting, fail to start, hesitate under throttle, or stall at particular angles on hills.

The check engine light will illuminate any time there is a failed EVAP system test. This will be indicated by the various on-board diagnostics trouble codes that are stored in the vehicle's memory. Also, in some models, there may be a popping sound accompanying the check engine light, as the leak detection pump continuously attempts to pressurize the fuel tank. A fuel tank leak may also cause difficulty starting the engine, a rough idle, and poor fuel mileage. When a fuel tank is simply corroded to the point of failure, the exterior tank condition rarely shows damage. The inside of the fuel tank will be rusted or corroded, and rust flakes or other debris may be floating in the fuel.

For most vehicles, the only symptom will be a check engine light or fuel tank filler cap light illuminating on the driver instrument cluster. This is to signal that there is an evaporative emissions (EVAP) leak. In some situations, the vehicle may take longer than normal to start, or, more rarely, the engine may not start at all. on-board diagnostic (OBD) trouble codes will refer to EVAP system failures such as a small or massive EVAP system leak. Lastly, the powertrain control module may notice a lean running condition, which could even lead to random and infrequent misfires.

What are the potential causes and diagnostic steps for a gas smell in a 2017 Kia Forte5?

When you detect a gas smell in your 2017 Kia Forte5, the first step is to check the gas cap. A loose or damaged cap can easily allow fuel vapors to escape, so ensure it is securely tightened. If the smell persists, inspect the fuel system for any visible leaks or signs of wear, particularly around hoses and connections. Next, evaluate the emissions control system, focusing on the catalytic converter and related components, as malfunctions here can also contribute to gas odors. If you suspect a fuel leak, it is crucial to address it immediately due to safety concerns; consider consulting a mechanic for a thorough inspection. Should the issue remain unresolved after these checks, a professional diagnostic, potentially involving a smoke test, may be necessary to accurately identify the source of the gas smell. By following this structured approach, you can effectively troubleshoot and potentially resolve the issue on your own.

What could be causing a gas smell in my 2017 Kia Forte5?

If you're detecting a gas smell in your 2017 Kia Forte5, it's essential to investigate several common problems that could be at play. One of the first things to check is the gas cap; a loose or damaged cap can lead to fuel vapors escaping, which is a straightforward fix. Next, consider the fuel system, as leaks or malfunctions within this system can also produce a noticeable gas odor. Pay attention to the evaporative emissions system, which is designed to prevent fuel vapors from escaping into the atmosphere; any issues here could contribute to the smell. Additionally, the emissions control system may be malfunctioning, leading to gas odors. Lastly, don't overlook the catalytic converter, as a failing unit can not only cause a gas smell but may also trigger warning lights on your dashboard. While some of these issues can be diagnosed and potentially fixed at home, it's crucial to prioritize safety. If the smell persists or if you're unsure about the repairs, consulting a qualified mechanic is advisable to ensure your vehicle remains safe and functional.

How urgent is it to address a gas smell in a 2017 Kia Forte5?

When you notice a gas smell in your 2017 Kia Forte5, it is essential to act swiftly due to the serious implications it may have for your safety and the vehicle's functionality. A fuel odor can signal a fuel leak, which poses significant fire risks and can lead to hazardous situations if left unaddressed. Ignoring this warning could not only compromise your safety but also result in costly repairs if the issue escalates. It is advisable to refrain from driving the vehicle until the source of the smell is identified and resolved, as this precaution can prevent potential accidents and ensure that your Kia Forte5 remains in optimal condition. Prioritizing immediate inspection and repair is crucial to safeguarding both yourself and your vehicle from the dangers associated with fuel system issues.

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2017 Kia Forte5 Smells Like Gas: Causes & Solutions