2019 Buick Enclave Smells Like Gas

Identifying Potential Causes of Gas Smells in Your 2019 Buick Enclave and Safety Precautions to Take

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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 2019 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 2019 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 steps should I take to diagnose the gas smell in my 2019 Buick Enclave?

When diagnosing a gas smell in your 2019 Buick Enclave, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the area beneath your vehicle for any visible fuel leaks, as this can provide immediate insight into the problem. Next, ensure that the fuel cap is securely tightened, as a loose or damaged cap is a common culprit for gas odors. Following this, examine the fuel lines and connections for any signs of wear or leaks, tightening any loose fittings and replacing damaged components as necessary. If the smell persists, consider the condition of the fuel injector, as a malfunctioning injector can contribute to gas odors. Additionally, the evaporative emissions control system should be inspected, as issues here can also lead to fuel smells. If these steps do not resolve the issue, it may be time to consult a qualified mechanic for a thorough inspection, ensuring that any underlying problems are addressed promptly and effectively. By following this diagnostic approach, you can systematically identify and resolve the source of the gas smell in your vehicle.

What could be causing a gas smell in my 2019 Buick Enclave?

If you're detecting a gas smell in your 2019 Buick Enclave, it's crucial to understand the common problems that could be at play. One of the primary culprits is a fuel leak, which can stem from damaged fuel lines, faulty fuel injectors, or issues with the fuel tank itself. Before diving into repairs, check the fuel lines for any visible cracks or wet spots that might indicate a leak. Another simple yet often overlooked cause is a loose gas cap; ensure it is securely tightened after refueling to prevent vapors from escaping. Additionally, consider the evaporative emissions system, which manages fuel vapor release; a malfunction here can lead to noticeable gas odors. If the smell persists, inspect the exhaust system for leaks, as these can allow harmful fumes to enter the cabin, posing health risks. Lastly, an engine misfire may also contribute to the issue, as unburned fuel can escape into the exhaust. If you're not comfortable diagnosing these problems yourself, it's advisable to consult a professional mechanic to ensure your vehicle remains safe and functional.

How urgent is it to address a gas smell in a 2019 Buick Enclave?

Addressing a gas smell in your 2019 Buick Enclave is not just a matter of convenience; it is a critical safety issue that requires immediate attention. Gas leaks pose a significant risk of fire or explosion, particularly in the confined space of a vehicle, making it essential to act quickly. Additionally, inhaling gas fumes can lead to serious health problems, including dizziness and nausea, which can impair your ability to drive safely. Beyond the immediate health and safety concerns, neglecting a gas smell can result in further damage to your vehicle, leading to costly repairs down the line. Therefore, if you detect a gas odor, it is crucial to investigate the source and address the issue promptly to protect both your well-being and your vehicle's integrity.

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2019 Buick Enclave Smells Like Gas: Causes & Solutions