2014 Toyota Corolla Smells Like Gas

Addressing Gas Smells in Your 2014 Toyota Corolla and Safety Measures to Consider

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Reviewed by
Devin Cabugcal
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 2014 Toyota Corolla 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 2014 Toyota Corolla 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.

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 2014 Toyota Corolla?

When you detect a gas smell in your 2014 Toyota Corolla, it's essential to approach the diagnosis systematically to identify the root cause effectively. Start by inspecting the fuel system for any visible leaks, focusing on components like fuel lines, injectors, and the fuel tank. A common and straightforward issue could be a faulty fuel cap; ensure it is securely tightened and free from damage, as a loose cap can allow gas vapors to escape. Next, utilize an OBD-II scanner to check for any error codes that might indicate problems with the fuel system or emissions components. If no issues are found, turn your attention to the evaporative emissions system, examining the charcoal canister and purge valve for signs of wear or leaks. Additionally, inspect the exhaust system for any cracks or damaged gaskets that could contribute to the gas smell. Finally, monitor your fuel consumption for any sudden changes, as this can provide further clues about potential fuel system issues. By following these diagnostic steps, you can effectively narrow down the cause of the gas smell and take appropriate action to resolve it.

What could be causing a gas smell in my 2014 Toyota Corolla?

If you're detecting a gas smell in your 2014 Toyota Corolla, it's crucial to investigate the common problems that could be causing this issue. One of the primary culprits is a fuel leak, which can occur from various components such as fuel injectors, fuel lines, or even the fuel tank itself. Additionally, a faulty or loose fuel cap can lead to gas odors, as it may not seal properly, allowing vapors to escape. Another potential source is the evaporative emissions system, designed to manage fuel vapors; if this system malfunctions, it can result in noticeable gas smells. Furthermore, an exhaust system leak, particularly near the engine, can sometimes mimic the scent of gasoline. Lastly, overfilling your gas tank can lead to spillage, creating a strong odor inside the vehicle. Addressing these issues promptly is essential for your safety and the proper functioning of your vehicle, so if you're unable to pinpoint the problem, consulting a qualified mechanic is highly recommended.

How urgent is it to address a gas smell in my 2014 Toyota Corolla?

Addressing a gas smell in your 2014 Toyota Corolla is not just a matter of convenience; it is a critical safety issue that requires immediate attention. Gas leaks pose significant risks, including the potential for fire or explosion, particularly in the confined space of your car. Moreover, inhaling gas fumes can lead to serious health problems, such as dizziness and nausea, which can impair your ability to drive safely. Ignoring this warning sign can also result in further damage to your vehicle, leading to more extensive and costly repairs down the line. Therefore, if you detect a gas smell, it is essential to act quickly. Start by checking for visible leaks around the fuel lines and connections, and inspect the fuel tank for any signs of damage. If you are not comfortable performing these checks yourself, it is advisable to consult a professional mechanic. Taking prompt action not only ensures your safety but also helps maintain the integrity of your vehicle.

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2014 Toyota Corolla Smells Like Gas? Causes & Solutions