2020 Ford Expedition Smells Like Gas

Addressing Gas Smells in Your 2020 Ford Expedition for Safety

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 2020 Ford Expedition 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 2020 Ford Expedition 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 potential causes and diagnostic steps for a gas smell in a 2020 Ford Expedition?

When you detect a gas smell in your 2020 Ford Expedition, it's essential to approach the diagnosis methodically to identify the root cause effectively. Start by inspecting the vehicle for any visible fuel leaks, as these can often be the most straightforward issues to resolve. Look under the vehicle for any signs of wet spots or puddles that may indicate a leaking fuel line or injector. Next, check the fuel cap to ensure it is securely tightened; a loose or damaged cap can allow gas vapors to escape, creating a noticeable odor. If these initial checks do not reveal the problem, consider using an OBD-II scanner to look for any error codes that might provide insight into the issue. Additionally, examine the evaporative emissions system components, such as the charcoal canister and purge valve, for any signs of damage or leaks. Don’t overlook the exhaust system; inspect it for cracks or leaks that could also contribute to the gas smell. Finally, monitor your fuel consumption for any unusual changes, as this can indicate underlying issues with fuel efficiency. By following these diagnostic steps, you can systematically narrow down the potential causes of the gas smell and take the necessary actions to address the problem.

What could be causing my 2020 Ford Expedition to smell like gas?

If you're detecting a gas smell in your 2020 Ford Expedition, it's crucial to identify the underlying cause to ensure your safety and the vehicle's performance. One of the most common culprits is a fuel leak, which can occur in various components such as the fuel tank, fuel lines, or fuel injectors. These leaks not only create a strong odor but can also pose serious safety risks, so they should be addressed immediately. Another potential issue could be a faulty fuel injector that fails to atomize fuel correctly, leading to an unpleasant gasoline smell. Additionally, problems with the evaporative emissions system, including a malfunctioning charcoal canister or purge valve, can allow gas vapors to escape, contributing to the odor. Don't overlook the gas cap; a loose, damaged, or missing cap can also release fuel vapors into the air. Lastly, exhaust system issues, such as leaks or a damaged catalytic converter, can sometimes mimic a gas smell inside the cabin. If you notice any of these signs, it's advisable to conduct a thorough inspection or consult a qualified mechanic to diagnose and resolve the issue effectively.

What immediate actions should be taken if a 2020 Ford Expedition smells like gas?

If you detect a gas smell in your 2020 Ford Expedition, it is essential to act swiftly to mitigate any potential dangers. The first step is to stop driving the vehicle immediately, as continuing to operate it could lead to serious safety hazards, including the risk of fire or explosion. Next, conduct a thorough inspection around the vehicle for any visible signs of gasoline leaks, which could indicate a more significant problem. Additionally, check the fuel cap to ensure it is securely tightened, as a loose cap can allow gas fumes to escape, contributing to the odor. It is crucial to avoid starting the engine if you suspect a gas leak, as ignition could exacerbate the situation. Seeking professional help from a qualified mechanic or Ford dealership is vital, as they can accurately diagnose and address issues such as fuel leaks or faulty components. Prioritizing safety during this process is paramount; avoid smoking near the vehicle, ensure proper ventilation, and keep open flames away to minimize fire risks. By taking these immediate actions, you can effectively address the gas smell and protect both your safety and the integrity of your vehicle.

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.

2020 Ford Expedition Smells Like Gas: Causes & Solutions