2012 Mitsubishi Eclipse Smells Like Gas

Addressing Gas Smells in Your 2012 Mitsubishi Eclipse and Safety Measures

Find Repair Location
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 2012 Mitsubishi Eclipse 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 2012 Mitsubishi Eclipse 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 are the potential causes of a gas smell in a 2012 Mitsubishi Eclipse, and how should I diagnose the issue?

When faced with a gas smell in your 2012 Mitsubishi Eclipse, it's essential to adopt a systematic diagnostic approach to identify the underlying issue. Start with a thorough visual inspection of the fuel system, focusing on the fuel tank, lines, and injectors for any signs of leaks or damage. Pay particular attention to the gas cap, ensuring it is tightly secured, as a loose or damaged cap can easily allow fuel vapors to escape. If the check engine light is illuminated, utilizing an OBD-II scanner can provide valuable error codes that may point to specific problems, such as a faulty fuel injector or issues within the evaporative emissions system. If these initial checks do not reveal the source of the gas smell, consider inspecting the exhaust system for any leaks that could be misinterpreted as fuel odors. Should you still be unable to pinpoint the issue, seeking the expertise of a qualified mechanic is advisable for a comprehensive evaluation. By following this structured approach, you can effectively diagnose and address the gas smell in your vehicle, ensuring both safety and performance.

What are the common causes of a gas smell in a 2012 Mitsubishi Eclipse?

When you notice a gas smell in your 2012 Mitsubishi Eclipse, it's important to investigate the source to maintain safety and vehicle integrity. A fuel leak is often the primary suspect, which can stem from components like fuel injectors, fuel lines, or the fuel tank itself. Additionally, a loose or damaged fuel cap can allow fuel vapors to escape, contributing to the odor. The evaporative emissions system, responsible for managing fuel vapors, may also malfunction, leading to noticeable gas smells inside the cabin. Furthermore, leaks in the exhaust system, particularly near the catalytic converter or muffler, can produce a gas-like odor. Lastly, engine performance issues, such as running too rich, can result in excessive fuel burning, intensifying the smell. Promptly addressing these potential problems is crucial for ensuring both your safety and the optimal performance of your vehicle.

How urgent is it to address the gas smell in my 2012 Mitsubishi Eclipse?

Addressing a gas smell in your 2012 Mitsubishi Eclipse is not just a matter of convenience; it is an urgent safety concern that should not be overlooked. Gas leaks can lead to catastrophic outcomes, including the risk of fire, which endangers not only your life but also the lives of others nearby. Additionally, the inhalation of gas fumes poses serious health risks, with symptoms ranging from mild discomfort to severe health complications with prolonged exposure. Beyond the immediate dangers, neglecting this issue can result in further damage to your vehicle, leading to more extensive and costly repairs down the line. Therefore, it is imperative to take immediate action if you detect a gas smell in your car, 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.

2012 Mitsubishi Eclipse Smells Like Gas: Causes & Repairs