2018 Ram ProMaster City Smells Like Gas

Addressing Gas Smells in Your 2018 Ram ProMaster City and Safety Precautions

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Reviewed by
Aisha
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 2018 Ram ProMaster City 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 2018 Ram ProMaster City 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 are the potential causes of a gas smell in a 2018 Ram ProMaster City, and how should I diagnose the issue?

When diagnosing a gas smell in your 2018 Ram ProMaster City, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex issues. Start by inspecting the fuel system for any visible leaks, focusing on the fuel lines, tank, and injectors, as these are common culprits. Next, ensure that the fuel cap is securely fastened, as a loose or damaged cap can easily allow gas vapors to escape. If these initial checks do not resolve the issue, turn your attention to the Evaporative Emission Control System (EVAP), which plays a crucial role in containing fuel vapors; look for any signs of malfunction in components like the charcoal canister or purge valve. Additionally, examine the exhaust system for leaks, as these can sometimes allow gas fumes to infiltrate the cabin. Finally, if the smell persists, consider having the engine inspected for potential problems such as faulty fuel injectors or issues with the fuel pressure regulator. By following this diagnostic approach, you can effectively identify and address the source of the gas smell in your vehicle.

What are the common causes of a gas smell in a 2018 Ram ProMaster City?

When you notice a gas smell in your 2018 Ram ProMaster City, it's important to investigate the potential causes to maintain safety and vehicle integrity. A leaking fuel injector is a common issue that can release gas vapors, creating a noticeable odor inside the vehicle. Similarly, faulty fuel lines, which may be damaged or deteriorating, can lead to gas leaks and a strong smell. Don't overlook the gas cap; if it's loose, damaged, or missing, it can allow fuel vapors to escape, contributing to the unpleasant odor. Additionally, problems with the evaporative emissions control system, such as a malfunctioning charcoal canister or purge valve, can also result in gas smells. Lastly, a leak in the fuel tank itself can produce a significant gas odor. It's crucial to address these issues promptly, as they not only impact your driving experience but can also pose serious safety risks. If you detect a gas smell, consulting a qualified mechanic for a thorough inspection and resolution is highly recommended.

How urgent is it to address a gas smell in a 2018 Ram ProMaster City?

Addressing a gas smell in your 2018 Ram ProMaster City is not just a matter of convenience; it is an urgent necessity that should not be overlooked. The presence of gasoline fumes can signal a fuel leak, which poses an immediate safety hazard due to the flammable nature of gasoline. Ignoring this warning can lead to catastrophic consequences, including the risk of fire or explosion. Moreover, inhaling gasoline vapors can have serious health implications, leading to symptoms such as dizziness and nausea, and prolonged exposure can result in more severe health issues. Beyond personal safety, a gas leak can also harm the environment, contributing to air pollution and potentially damaging local ecosystems. Additionally, neglecting a gas smell can lead to significant vehicle damage, resulting in costly repairs down the line. Therefore, it is imperative to take any gas smell seriously and address it promptly to safeguard your health, the environment, and your vehicle's integrity.

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