2020 Hyundai Tucson Smells Like Gas

Common Causes of Gas Smells in Your 2020 Hyundai Tucson and How to Address Them Safely

Find Repair Location
Reviewed by
Aisha
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 2020 Hyundai Tucson 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 2020 Hyundai Tucson 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 steps to diagnose a gas smell in a 2020 Hyundai Tucson?

To effectively diagnose a gas smell in your 2020 Hyundai Tucson, start with a systematic approach that prioritizes simpler checks before moving on to more complex assessments. Begin by inspecting the area under your vehicle for any visible leaks, as puddles or drips of gasoline can indicate a fuel system issue. Next, ensure that the fuel cap is securely tightened, as a loose or damaged cap can allow gas odors to escape. Following this, examine the fuel lines for any signs of cracks, holes, or loose connections, as these can lead to leaks. It's also important to check the fuel injectors for proper functioning, since faulty injectors can contribute to gas smells. Additionally, inspect the fuel tank for any damage or corrosion, which could result in odors both inside and outside the vehicle. If these steps do not reveal the source of the smell, it may be necessary to consult a qualified mechanic for a thorough inspection. By following this diagnostic approach, you can efficiently identify and address the source of the gas smell in your Tucson, ensuring your vehicle remains safe and reliable.

What could be causing my 2020 Hyundai Tucson to smell like gas?

If you're noticing a gas smell in your 2020 Hyundai Tucson, it's essential to understand the common problems that could be causing this issue. One of the primary culprits is a fuel leak, which can occur in various parts of the fuel system, including fuel injectors, lines, or the fuel tank itself. This situation is not only concerning but also poses a significant safety risk, so it's crucial to address it immediately. Another potential cause could be a faulty or loose fuel cap, which is designed to maintain pressure in the fuel system and prevent vapors from escaping. If the cap is damaged or not secured properly, it can lead to noticeable gas odors. Additionally, issues with the evaporative emissions system, such as a malfunctioning charcoal canister or purge valve, can also result in a gas smell inside the cabin. Furthermore, a leak in the exhaust system, like a cracked manifold or damaged catalytic converter, may produce a gas-like odor. Lastly, overfilling the gas tank can lead to fuel spillage, contributing to the smell. For those inclined to DIY, it's advisable to conduct a thorough inspection of these components, but if the problem persists, consulting a qualified mechanic is the safest course of action.

How urgent is it to address a gas smell in a 2020 Hyundai Tucson?

Addressing a gas smell in your 2020 Hyundai Tucson is not just a matter of convenience; it is a pressing safety concern that should be treated with the utmost urgency. Gasoline is highly flammable, and even a small leak in the fuel system can lead to catastrophic consequences, including the risk of fire. Additionally, inhaling gasoline fumes can pose serious health risks, leading to symptoms such as dizziness, headaches, and nausea, which can escalate with prolonged exposure. Beyond immediate safety and health concerns, neglecting a gas smell can result in further damage to your vehicle's fuel system, potentially leading to more extensive and costly repairs. Therefore, if you detect a gas smell, it is crucial to act quickly by having your vehicle inspected by a qualified mechanic to identify and rectify the source of the odor, ensuring both your safety and the longevity of your vehicle.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.