2015 INFINITI Q50 Smells Like Gas

Identifying Potential Causes of Gas Smells in Your 2015 INFINITI Q50 and How to Address Them

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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 INFINITI Q50 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 INFINITI Q50 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.

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 and diagnostic steps for a gas smell in a 2015 INFINITI Q50?

When addressing a gas smell in your 2015 INFINITI Q50, it's crucial to adopt a systematic diagnostic approach to pinpoint the issue effectively. Start by checking the fuel cap, as a loose or damaged cap is a common and easily fixable cause of gas vapors escaping. If the cap is secure, proceed to inspect the fuel system for visible leaks, focusing on fuel lines, injectors, and the fuel tank, as these areas are often where leaks occur. If no leaks are found, using a diagnostic scanner can help identify any error codes related to the fuel system or emissions components, which may provide further insight into the problem. Additionally, examine the evaporative emissions system, particularly the charcoal canister and purge valve, as malfunctions in these components can contribute to gas odors. Lastly, inspect the exhaust system for any signs of leaks or damage, as these can allow exhaust fumes to infiltrate the cabin. By following this methodical approach, you can effectively diagnose and resolve the source of the gas smell in your vehicle.

What could be causing my 2015 INFINITI Q50 to smell like gas?

If you're detecting a gas smell in your 2015 INFINITI Q50, it's crucial to investigate the underlying causes to ensure your safety and the vehicle's 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. This can lead to a noticeable odor both inside and outside the vehicle. Another potential issue could be a faulty fuel injector, which may not atomize fuel correctly, resulting in unburned fuel that contributes to the gas smell. Additionally, problems with the evaporative emissions system, such as a malfunctioning charcoal canister or purge valve, can also lead to fuel vapors escaping into the cabin. Don't overlook the gas cap; a loose or damaged cap can allow vapors to escape, creating a noticeable odor. Lastly, an exhaust system leak, possibly from a cracked manifold or damaged catalytic converter, can also produce a gas-like smell inside the car. If you suspect any of these issues, it's advisable to conduct a thorough inspection or consult a qualified mechanic to diagnose and resolve the problem effectively.

How urgent is it to address the gas smell in my 2015 INFINITI Q50?

Addressing a gas smell in your 2015 INFINITI Q50 is not just a matter of inconvenience; it is a critical safety concern that demands immediate attention. The presence of gasoline fumes can indicate a fuel leak, which poses a significant fire hazard and increases the risk of explosion, especially in a confined space like a vehicle. Moreover, inhaling gasoline vapors can lead to serious health issues, including dizziness, headaches, and respiratory problems, making it essential to prioritize your well-being. Ignoring this warning sign can also result in further damage to your car's engine or fuel system, leading to costly repairs down the line. Therefore, if you detect a gas smell, it is imperative to investigate the source and address the issue without delay to ensure your safety, health, and the longevity of your vehicle.

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