Dodge Challenger Smells Like Gas

Common Causes of Fuel Odors in Your Dodge Challenger and How to Address Them Safely

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Reviewed by
Aisha
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 Dodge Challenger 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 Dodge Challenger 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.

Troubleshooting Gas Smell Issues in a Dodge Challenger

When addressing gas smell issues in your Dodge Challenger, begin by inspecting the gas cap, as a loose or damaged cap is often the simplest and most common culprit. Ensure it is tightly sealed, as this can prevent gas odors from escaping. Next, examine the fuel system for any visible leaks, particularly around the fuel pump and injectors, as these areas are prone to issues. If the smell persists, check the emissions control system, including the charcoal canister, to confirm it is functioning properly; raw gasoline entering this system can lead to noticeable odors. Additionally, inspect body seals around the fuel pump hat for any dislodgement, as compromised seals can also contribute to gas smells. Be mindful of potential coolant leaks, which can sometimes mimic the scent of gasoline, so differentiate between the two by checking for a sweet smell or residue on the windshield. Finally, if you suspect a more serious issue, such as a leaking fuel pump, particularly when the tank is over half full, it may be necessary to delve deeper into the fuel tank and associated components. By following this methodical approach, you can effectively identify and resolve the source of the gas smell in your vehicle.

What Could Cause a Gas Smell in a Dodge Challenger?

When you detect a gas smell in your Dodge Challenger, it’s essential to identify the underlying cause to ensure both safety and vehicle performance. One of the most frequent culprits is a faulty gas cap, which can allow fuel vapors to escape if its seal has worn out. Inspecting the gas cap for cracks or improper sealing is a straightforward first step. Additionally, consider the condition of the fuel system; leaks from the fuel pump or fuel lines can lead to noticeable gas odors. A visual inspection for wet spots or stains around these components can help pinpoint any issues. Furthermore, a failing catalytic converter may not only trigger the check engine light but also emit unusual smells from the exhaust, which can be mistaken for gasoline. Lastly, be aware that interior coolant leaks can sometimes mimic a gas smell, so checking for sweet odors or residue on the windshield is advisable. By systematically examining these areas, you can effectively diagnose and address the source of the gas smell, ensuring your Dodge Challenger remains safe and reliable on the road.

What Should You Do If Your Dodge Challenger Smells Like Gas?

If your Dodge Challenger emits a gasoline smell, it’s essential to act swiftly, as this could indicate a serious issue that poses safety risks, including the potential for fire. Start by thoroughly inspecting your vehicle for any signs of fuel leaks, particularly in the engine bay and undercarriage, where gasoline can evaporate quickly, making leaks hard to detect. Pay special attention to the body seal near the fuel pump hat under the rear seat, as a dislodged seal can lead to fumes entering the cabin. Additionally, check for leaks around the fuel pump and canister, as these components are common culprits. If you notice any drips or a strong odor, it’s crucial to refrain from driving the vehicle and seek professional assistance immediately. Regular maintenance and inspections can help prevent these issues, but if you suspect a leak, addressing it promptly is vital to ensure your safety and the longevity of your vehicle. Ignoring these symptoms can lead to more significant damage and costly repairs, so don’t delay in taking action.

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