2013 Honda Civic Smells Like Gas

Common Causes of Gas Smells in Your 2013 Honda Civic and How to Address Them Safely

Find Repair Location
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 2013 Honda Civic 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 2013 Honda Civic 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.

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 2013 Honda Civic?

When diagnosing a gas smell in your 2013 Honda Civic, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by ensuring that the fuel cap is securely tightened, as a loose or damaged cap can lead to fuel vapors escaping. Next, inspect the fuel system for any visible leaks or damage, focusing on the fuel lines, connections, and components. Pay particular attention to the fuel rail and injectors, checking the O-rings for signs of wear. If you suspect a more significant issue, examine the fuel filter and pump assembly, which may require removing the back seat for access. The evaporative emission control (EVAP) system is another critical area to investigate; check the charcoal canister and associated valves for proper function. Utilizing an OBD2 scan tool can help identify any error codes related to the EVAP system, guiding your next steps. Don’t forget to check under the vehicle for any fuel drips and inspect the exhaust for raw gasoline smells, which could indicate engine issues. Lastly, if the smell is present inside the cabin, adjusting the ventilation system can help mitigate the issue. By following this structured approach, you can effectively diagnose the source of the gas smell and determine whether a DIY fix is feasible or if professional assistance is needed.

What could be causing my 2013 Honda Civic to smell like gas?

If your 2013 Honda Civic is emitting a gasoline smell, it’s essential to investigate several common problems that could be the source. One of the primary culprits is a fuel system leak, which can occur in various components such as the fuel lines, fuel tank, or connections. Inspect these areas for any visible signs of leakage or loose fittings, particularly around the gas tank and filler neck. Additionally, a faulty or improperly sealed gas cap can allow fuel vapors to escape, contributing to the odor. Another potential issue lies within the Evaporative Emission Control (EVAP) system; components like the charcoal canister or associated valves may be damaged or malfunctioning, leading to gas fumes escaping. Fuel injector problems can also be a factor, as a sticking injector may cause the engine to run rich, resulting in a noticeable gasoline smell. Furthermore, a malfunctioning coolant temperature sensor can trick the engine into using more fuel than necessary, exacerbating the issue. Lastly, ensure that the gas filler line is intact, as any cracks or holes can lead to fuel escaping, especially when the tank is full. By methodically checking these areas, you can effectively identify and address the source of the gasoline smell in your vehicle.

How urgent is it to address a gas smell in my 2013 Honda Civic?

Addressing a gas smell in your 2013 Honda Civic is not just a matter of inconvenience; it is a critical safety issue that demands immediate attention. The presence of gasoline fumes can indicate a serious fuel leak, which poses a significant risk of fire or explosion. Ignoring this warning can lead to catastrophic consequences, not only for you but also for others on the road. Additionally, inhaling gasoline vapors can have detrimental effects on your health, leading to symptoms such as dizziness, headaches, and long-term respiratory issues. The potential causes of a gas smell, such as leaks in the fuel lines, issues with the EVAP system, or faulty fuel injectors, can escalate into more severe mechanical failures if left unchecked. Therefore, if you detect a gas odor, it is imperative to stop driving immediately, investigate the source, and take appropriate action, whether that means checking simple components like the gas cap or seeking professional assistance. Prioritizing this issue can prevent not only dangerous situations but also costly repairs down the line.

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.

2013 Honda Civic Smells Like Gas: Causes & Solutions