2021 Mitsubishi Mirage Smells Like Gas

Common Causes of Gas Smells in Your 2021 Mitsubishi Mirage and How to Address Them Safely

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Reviewed by
Bo Fader
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 Mitsubishi Mirage 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 Mitsubishi Mirage 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 steps should I take to diagnose the gas smell in my 2021 Mitsubishi Mirage?

When diagnosing a gas smell in your 2021 Mitsubishi Mirage, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by visually inspecting the area beneath your vehicle for any obvious fuel leaks, such as dripping fuel or wet spots, which can indicate a significant issue. Next, ensure that the fuel cap is securely tightened, as a loose cap can lead to gas fumes escaping. Proceed to examine the fuel lines and connections for any signs of wear, such as cracks or loose fittings, which could contribute to the odor. Additionally, check the fuel injector for proper function and any potential leaks. It's also crucial to inspect the fuel tank for damage or leaks that might be causing the smell. Don't overlook the evaporative emissions control system; components like the charcoal canister and purge valve should be assessed for any malfunctions. Finally, using an OBD-II scanner can help identify any error codes related to the fuel system, providing further insight into the problem. If these steps do not reveal the source of the gas smell, or if you feel uncertain about any aspect of the diagnosis, seeking assistance from a qualified mechanic is advisable to ensure your vehicle is safe and functioning correctly.

What could be causing my 2021 Mitsubishi Mirage to smell like gas?

If your 2021 Mitsubishi Mirage is giving off a gas smell, it’s crucial to identify the underlying cause to ensure both safety and vehicle performance. One of the most common culprits is a fuel leak, which can occur from damaged fuel lines, injectors, or even the fuel tank itself. Inspecting these components for any signs of wear or damage can help you pinpoint the issue. Additionally, a faulty fuel injector may not atomize fuel correctly, leading to an odor; checking for leaks or irregularities in the injector can be beneficial. Another area to consider is the evaporative emissions system, which manages fuel vapor release; any malfunction here can result in noticeable gas smells. Don’t overlook the gas cap, as a loose or damaged cap can allow vapors to escape. Lastly, an exhaust system leak, particularly near the engine, can sometimes mimic a gas smell inside the cabin. If you’re comfortable with DIY repairs, start by visually inspecting these components, but remember that if the problem persists, consulting a qualified mechanic is advisable for a thorough diagnosis.

How urgent is it to address a gas smell in a 2021 Mitsubishi Mirage?

Addressing a gas smell in your 2021 Mitsubishi Mirage is not just a matter of convenience; it is a pressing safety concern that requires immediate attention. Ignoring the smell of gas can lead to severe consequences, including the risk of fire or explosion, which can endanger both you and others around you. Additionally, inhaling gas fumes poses serious health risks, potentially causing symptoms like dizziness, nausea, and headaches. Beyond safety and health implications, a gas leak may indicate underlying issues with your vehicle's fuel system, which could result in decreased performance or even a breakdown if left unaddressed. Therefore, if you detect a gas smell, it is crucial to act swiftly by consulting a professional to diagnose and resolve the issue, ensuring both your safety and the reliable operation of your Mitsubishi Mirage.

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