2023 Buick Enclave Smells Like Gas

Common Causes of Fuel Odors in Your 2023 Buick Enclave and Essential Safety Measures to Take

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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 2023 Buick Enclave 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 2023 Buick Enclave 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.

What could be causing the gas smell in my 2023 Buick Enclave, and what steps should I take to diagnose the issue?

When you detect a gas smell in your 2023 Buick Enclave, it's essential to approach the diagnosis methodically to ensure safety and effectiveness. Start by checking the fuel cap; a loose or damaged cap can easily allow gas vapors to escape, creating a noticeable odor. If the cap is secure, inspect the fuel lines and connections for any signs of leaks, as even minor leaks can lead to significant smells. Next, examine the fuel injector O-rings for wear or damage, as faulty O-rings can also contribute to fuel leaks. If these initial checks do not reveal the source, consider the evaporative emissions control system, which includes components like the charcoal canister and purge valve; issues here can lead to gas odors as well. Lastly, don’t overlook the exhaust system; a leak or malfunctioning catalytic converter can also cause gas smells inside the vehicle. If you’re unable to identify the issue after these checks, it’s wise to consult a professional mechanic for a thorough inspection. By following this structured approach, you can effectively diagnose the gas smell in your Buick Enclave and take appropriate action.

What could be causing a gas smell in my 2023 Buick Enclave?

If you're detecting a gas smell in your 2023 Buick Enclave, it's crucial to identify the underlying cause to ensure your safety and the vehicle's integrity. One of the most common issues is a fuel leak, which can stem from damaged fuel lines, faulty fuel injectors, or even a compromised fuel tank. Addressing a fuel leak is vital, as it poses significant safety hazards. Another frequent culprit is a faulty fuel cap; if it's loose, damaged, or missing, it can allow fuel vapors to escape, leading to that unmistakable gas odor. Additionally, problems within the evaporative emissions system, such as a malfunctioning charcoal canister or purge valve, can also contribute to the smell. It's worth noting that an exhaust system leak, particularly near the catalytic converter, can produce a gas-like odor inside the cabin, indicating potential damage that needs attention. Lastly, overfilling the gas tank can lead to fuel spillage, resulting in a temporary gas smell. If you encounter this issue, it's advisable to conduct a thorough inspection or consult a qualified mechanic to diagnose and resolve the problem effectively.

How urgent is it to address the gas smell in my 2023 Buick Enclave?

Addressing a gas smell in your 2023 Buick Enclave is not just a matter of convenience; it is a critical safety concern that requires immediate attention. Gas leaks can lead to catastrophic outcomes, including the risk of fire or explosion, particularly in the confined space of a vehicle. Moreover, the inhalation of gas fumes poses serious health risks, with symptoms ranging from dizziness and headaches to more severe complications with prolonged exposure. Ignoring this warning sign can also result in further damage to your vehicle's components, leading to costly repairs down the line. For those inclined to take a DIY approach, it is essential to first ensure your safety by ventilating the area and avoiding any ignition sources. However, given the potential dangers associated with gas leaks, it is advisable to consult a professional mechanic who can accurately diagnose and resolve the issue, ensuring both your safety and the longevity of your vehicle.

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2023 Buick Enclave Smells Like Gas: Causes & Solutions