Jeep Cherokee Smells Like Gas

Common Causes of Fuel Odors in Your Jeep Cherokee and How to Address Them Safely

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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 Jeep Cherokee 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 Jeep Cherokee 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.

Troubleshooting Gas Smell Issues in a Jeep Cherokee

When faced with a gas smell in your Jeep Cherokee, it's essential to adopt a methodical diagnostic approach to identify and resolve the issue effectively. Start with a thorough visual inspection of the fuel system, paying close attention to the fuel lines, tank, and pump for any signs of leaks or damage. A common culprit is a faulty gas cap, so ensure it is securely fastened and in good condition, as this can often be an easy fix that prevents fuel vapor from escaping. If the smell persists, consider utilizing diagnostic tools to further pinpoint the source of the issue, particularly if you suspect problems with the Evaporative Emission Control System (EVAP). Should your efforts not yield results, seeking assistance from a professional mechanic is advisable to ensure safety and proper resolution. Regular maintenance and proper gas cap usage are key preventative measures that can help avoid future gas smell issues, keeping your Jeep running smoothly and safely.

What Could Cause a Gas Smell in a Jeep Cherokee?

When you detect a gas smell in your Jeep Cherokee, it’s essential to investigate the source to ensure safety and prevent further damage. One of the most common culprits is leaking fuel lines, which can develop cracks or corrosion over time, leading to fuel seepage. Inspecting the fuel lines for visible signs of wear or damage can help you determine if this is the issue. Another frequent cause is a faulty gas cap; if it’s loose, damaged, or not sealing properly, it can allow fuel vapors to escape. A simple check of the gas cap can often resolve the problem. Additionally, issues within the fuel system, such as overfilling the gas tank or leaks in the fuel injectors, can contribute to the odor. It’s also worth examining the evaporative emissions control system, as malfunctions here can lead to gas smells as well. If you notice a persistent fuel odor, it’s crucial to address it immediately, as it may indicate a serious fuel leak that poses safety risks. Taking the time to investigate these common problems can help you maintain your vehicle’s safety and performance.

What Should You Do If Your Jeep Cherokee Smells Like Gas?

If your Jeep Cherokee emits a gasoline odor, it’s essential to act swiftly, as neglecting this symptom can lead to serious safety hazards, including fire risks and engine damage. Start by identifying the source of the smell; a thorough visual inspection of the fuel lines, tank, and pump can reveal leaks or damage that require immediate attention. Pay close attention to the gas cap, as a faulty or loose cap can allow fumes to escape, contributing to the odor. Cleaning the area around the gas tank is also important, as debris can sometimes exacerbate the smell. Additionally, inspect the EVAP system for any damaged hoses that could be leaking fuel vapors. If you find that the gas cap is the culprit, simply replacing it may resolve the issue. However, if the smell persists despite your efforts, it’s crucial to consult a professional mechanic to prevent further complications. Addressing a gas smell promptly not only ensures your safety but also protects your vehicle from potential damage.

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Why Your Jeep Cherokee Smells Like Gas: Causes & Solutions