2016 Acura MDX Smells Like Gas

Identifying Potential Causes of Gas Smells in Your 2016 Acura MDX and Safety Precautions to Take

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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 2016 Acura MDX 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 2016 Acura MDX 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 steps should I take to diagnose the gas smell in my 2016 Acura MDX?

To effectively diagnose the gas smell in your 2016 Acura MDX, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the fuel cap, ensuring it is tightly secured, as a loose or damaged cap is a common culprit for gas odors. Next, look for visible leaks under the vehicle, paying attention to any wet spots or dripping fuel that could indicate a more serious issue. Following this, examine the fuel lines and connections for any signs of wear or damage, as these are often sources of leaks. Don’t overlook the fuel injector O-rings, which can deteriorate over time and lead to gas leaks. Additionally, check the charcoal canister, as any damage or saturation can contribute to gas smells. Finally, inspect the exhaust system and the fuel tank for any leaks or damage that could be causing the odor. By following this diagnostic approach, you can efficiently identify the source of the gas smell and take appropriate action to resolve the issue.

What could be causing the gas smell in my 2016 Acura MDX?

If you're detecting a gas smell in your 2016 Acura MDX, it's crucial to understand the common problems that could be at play. One of the primary culprits is a fuel leak, which can occur in various components such as the fuel tank, fuel lines, or fuel injectors. This type of leak not only poses a risk of fire but can also lead to decreased fuel efficiency. Another potential issue is a faulty fuel injector, which may leak fuel into the engine compartment if it’s not functioning correctly, resulting in a noticeable odor. Additionally, problems with the evaporative emissions system, including a malfunctioning charcoal canister or purge valve, can contribute to the gas smell inside the vehicle. Exhaust system leaks, particularly in areas like the exhaust manifold or catalytic converter, can also produce a gas-like odor. Lastly, overfilling the gas tank can lead to fuel spillage, creating a smell that lingers in the cabin. If you encounter this issue, it’s advisable to conduct a thorough inspection or consult a qualified mechanic to ensure your vehicle remains safe and operational.

How urgent is it to address the gas smell in my 2016 Acura MDX?

Addressing a gas smell in your 2016 Acura MDX is not just a minor inconvenience; it is an urgent matter that requires immediate attention. The presence of gas fumes can indicate a leak, which poses a significant fire hazard, endangering both your safety and that of others. Moreover, inhaling these fumes can lead to serious health issues, including dizziness, headaches, and nausea, particularly with prolonged exposure. Beyond the immediate health and safety risks, neglecting this issue can 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 quickly to diagnose and resolve the problem, ensuring both your well-being and the longevity of your Acura MDX.

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