2021 Kia Soul Smells Like Gas

Common Causes of Fuel Odors in Your 2021 Kia Soul and How to Address Them Safely

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
15% chance it's the
Gas Cap
0%
40% chance it's the
Emissions Control System
0%
45% chance it's
Something else
The most common reasons a 2021 Kia Soul 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 system pressure.
  • 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 2021 Kia Soul 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.

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 could be causing the gas smell in my 2021 Kia Soul, and what steps should I take to diagnose the issue?

When you notice a gas smell in your 2021 Kia Soul, it's crucial to diagnose the issue systematically to ensure both safety and effective resolution. Begin by inspecting the fuel system for any leaks, focusing on the fuel lines, tank, and injectors, as even minor leaks can produce a strong odor. Next, check the fuel cap to ensure it is securely fastened; a loose or damaged cap can release gas vapors into the cabin. If these checks do not reveal the source, examine the exhaust system for any damage or holes that could allow exhaust fumes to enter the vehicle. Additionally, consider the evaporative emissions control system, as faults in components like the charcoal canister or purge valve may also lead to a gas smell. If you still cannot identify the problem after these assessments, it is advisable to seek assistance from a qualified mechanic who can conduct a thorough inspection and diagnostic tests. By following this methodical approach, you can effectively pinpoint the cause of the gas smell and take the necessary steps to address it.

What could be causing a gas smell in my 2021 Kia Soul?

If you're detecting a gas smell in your 2021 Kia Soul, it's crucial to understand the common problems that could be at play. One of the primary culprits is a fuel leak, which can stem from damaged fuel lines, faulty fuel injectors, or issues with the fuel tank itself. Inspecting these components for visible signs of wear or damage can be a good starting point. Additionally, a loose gas cap is often overlooked; ensuring that it is securely tightened after refueling can prevent fuel vapors from escaping. Another potential issue is related to the evaporative emissions system, which captures fuel vapors and can malfunction, leading to odors inside the vehicle. If you suspect this might be the case, checking for any disconnected or damaged hoses can be beneficial. Furthermore, an exhaust system leak, such as a crack in the exhaust manifold or a damaged catalytic converter, can also allow gas smells to infiltrate the cabin. Lastly, be cautious about overfilling your gas tank, as this can lead to fuel spillage and subsequent odors. Addressing these issues promptly is essential for both safety and vehicle performance, and while some problems can be tackled with DIY methods, consulting a qualified mechanic for a thorough inspection is advisable if the smell persists.

How urgent is it to address a gas smell in my 2021 Kia Soul?

Addressing a gas smell in your 2021 Kia Soul is not just a matter of inconvenience; it is a pressing safety concern that requires immediate attention. Gas leaks can lead to catastrophic outcomes, including the risk of fire or explosion, particularly if the gas encounters a spark. Moreover, the inhalation of gas fumes poses serious health risks, with symptoms ranging from dizziness and nausea to more severe effects like unconsciousness. Beyond the immediate dangers to your health and safety, neglecting a gas smell can result in further damage to your vehicle, leading to costly repairs down the line. Therefore, if you notice a gas odor, it is crucial to act swiftly by consulting a professional mechanic or contacting your dealership. Taking prompt action not only safeguards your well-being but also protects your vehicle from potential harm.

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