2012 Honda Fit Smells Like Gas

Common Causes of Gas Smells in Your 2012 Honda Fit and Essential Safety Measures to Take

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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
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40% chance it's the
Emissions Control System
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45% chance it's
Something else
The most common reasons a 2012 Honda Fit 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 Honda Fit 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 2012 Honda Fit?

To effectively diagnose a gas smell in your 2012 Honda Fit, start with a systematic approach that prioritizes simpler checks before delving into more complex issues. Begin by inspecting the fuel cap, as a loose or damaged cap is a common culprit for gas odors and is easily rectified. Next, look for visible leaks under the vehicle, which can indicate a more serious problem with the fuel system. If no obvious leaks are found, examine the fuel lines and connections for any signs of wear or damage. Pay special attention to the fuel injector O-rings, as faulty seals can lead to gas smells. Additionally, inspect the charcoal canister, which plays a crucial role in managing fuel vapors; any damage here could contribute to the odor. Finally, check the fuel tank and filter for any cracks or clogs that might be causing the issue. By following this diagnostic approach, you can efficiently identify the source of the gas smell and take the necessary steps to resolve it.

What could be causing my 2012 Honda Fit to smell like gas?

If your 2012 Honda Fit is giving off a gas smell, it’s crucial to identify the underlying problem to ensure safe operation. One of the first things to check is the gas cap; a loose or damaged cap can easily allow gasoline vapors to escape, creating a noticeable odor. Next, inspect the fuel system for leaks, particularly around fuel injectors and hoses, as these can lead to significant fuel loss and strong smells when the engine is running. Additionally, consider the emissions control system; a failing catalytic converter or other components can contribute to gas odors and may affect your vehicle's emissions performance. Lastly, a malfunctioning fuel pressure regulator can cause excessive fuel consumption and increased fumes. By systematically examining these areas, you can pinpoint the source of the gas smell and take appropriate action, whether that involves tightening the gas cap, replacing faulty components, or seeking professional assistance for more complex repairs.

How urgent is it to address the gas smell in my 2012 Honda Fit?

Addressing a gas smell in your 2012 Honda Fit is not just a matter of comfort; it is a critical safety issue that demands immediate attention. Ignoring this warning sign can lead to severe consequences, including the risk of fire due to potential gas leaks, which can ignite from even the smallest spark. Additionally, the health implications of inhaling gas fumes are significant, as they can cause dizziness, headaches, and nausea, posing a serious risk to your well-being. Furthermore, a gas leak can negatively impact your vehicle's fuel efficiency and may lead to costly engine damage if not resolved quickly. For those considering a DIY approach, it is essential to first identify the source of the gas smell, which could stem from a loose fuel line, a damaged fuel injector, or a faulty gas cap. However, due to the inherent risks associated with gas leaks, it is advisable to consult a professional mechanic to ensure a thorough and safe diagnosis and repair. Taking prompt action not only safeguards your health and safety but also protects your vehicle from further damage.

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