2015 Mitsubishi Lancer Smells Like Gas

Identifying the Causes of Gas Smells in Your 2015 Mitsubishi Lancer and Essential Safety Measures

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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 2015 Mitsubishi Lancer 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 2015 Mitsubishi Lancer 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 for a gas smell in a 2015 Mitsubishi Lancer, and how should I diagnose the issue?

When faced with a gas smell in your 2015 Mitsubishi Lancer, it's essential to adopt a systematic diagnostic approach to identify the root cause effectively. Start with a thorough visual inspection of the fuel system, looking for any signs of fuel leaks around the fuel lines, tank, and injectors. If you notice any wet spots or strong odors near these areas, it could indicate a fuel leak that needs immediate attention. Next, examine the evaporative emissions system, focusing on components like the charcoal canister and purge valve, as faults here can also lead to gas odors. Additionally, inspect the exhaust system for any leaks or damage, as issues such as a cracked exhaust pipe or malfunctioning catalytic converter can produce a gas-like smell. Lastly, be mindful of your refueling habits; overfilling the gas tank can cause fuel to spill, contributing to the odor. If these steps do not reveal the source of the smell, or if you feel uncertain about performing these checks, consulting a qualified mechanic is advisable for a comprehensive diagnosis and repair. By following this structured approach, you can ensure a safer driving experience and maintain the integrity of your vehicle.

What could be causing my 2015 Mitsubishi Lancer to smell like gas?

When your 2015 Mitsubishi Lancer emits a gas smell, it’s crucial to identify the underlying issues to ensure safety and vehicle integrity. One of the most common culprits is a fuel leak, which can stem from damaged fuel lines, faulty injectors, or even a cracked fuel tank. Addressing a fuel leak is vital, as it poses significant safety risks. Another potential cause is a loose gas cap; if it’s not sealed properly, fuel vapors can escape, leading to noticeable odors inside the car. Additionally, problems with the evaporative emissions system, which manages fuel vapors, may also be responsible. Components like the charcoal canister and purge valve should be inspected for any faults. Furthermore, an exhaust system leak can allow gas odors to infiltrate the cabin, necessitating professional evaluation to avoid exposure to harmful gases. Lastly, overfilling the gas tank can lead to spills and subsequent smells, so it’s important to fill the tank only to the recommended level. If the gas smell persists, seeking a qualified mechanic’s expertise is advisable to diagnose and rectify the issue effectively, ensuring both your safety and the longevity of your vehicle.

How urgent is it to address the gas smell in my 2015 Mitsubishi Lancer?

Addressing a gas smell in your 2015 Mitsubishi Lancer is not just a minor inconvenience; it is a pressing safety concern that requires immediate attention. The presence of gas fumes can indicate a leak in the fuel system, which poses a significant fire hazard and increases the risk of explosion. Moreover, inhaling these fumes can lead to serious health issues, including dizziness, headaches, and nausea, particularly with prolonged exposure. Ignoring this warning sign can also result in further damage to your vehicle, leading to costly repairs down the line. Therefore, it is essential to take any gas smell seriously and act swiftly to diagnose and resolve the issue, ensuring both your safety and the longevity of your car.

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2015 Mitsubishi Lancer: Why It Smells Like Gas & Solutions