2012 Buick Verano Smells Like Gas

Identifying the Causes of Gas Smells in Your 2012 Buick Verano and Essential Safety Measures

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Reviewed by
Bo Fader
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 2012 Buick Verano 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 2012 Buick Verano 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 2012 Buick Verano?

To effectively diagnose the gas smell in your 2012 Buick Verano, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the area under your vehicle for any visible signs of gasoline leaks, such as dripping fuel or wet spots around the fuel tank and fuel lines. Next, ensure that the fuel cap is securely tightened, as a loose or damaged cap can easily allow gas odors to escape. Following this, examine the fuel lines for any cracks, holes, or loose connections, as these can be common culprits for gas leaks. Additionally, check the fuel injectors to confirm they are functioning properly, since faulty injectors can also lead to gas odors. Don’t forget to inspect the fuel tank for any signs of damage or corrosion, which could contribute to the smell. If you’ve gone through these steps and still can’t identify the source of the gas smell, it’s wise to consult a mechanic who can conduct a thorough inspection and provide a professional diagnosis. By following this methodical approach, you can effectively pinpoint the issue and ensure your vehicle remains safe and functional.

What could be causing my 2012 Buick Verano to smell like gas?

When your 2012 Buick Verano has a gasoline smell, it’s vital to identify the underlying issues to ensure safety and prevent further damage. Common problems that could lead to this situation include a compromised fuel line, which may develop cracks or leaks over time, allowing gasoline to escape unnoticed. A malfunctioning fuel injector can also be a culprit, as it may fail to seal properly, causing fuel to seep into the engine bay. Additionally, a defective fuel pressure regulator can lead to excess fuel being released into the intake manifold, contributing to the odor. Don’t overlook the gas cap; a loose or damaged seal can allow fuel vapors to escape, intensifying the smell. Thoroughly inspecting these components is essential, as ignoring a gasoline odor can pose serious safety risks, including fire hazards. If you’re unsure about diagnosing these issues, it’s advisable to consult a professional to ensure your vehicle remains safe and operational.

How urgent is it to address a gas smell in a 2012 Buick Verano?

Addressing a gas smell in your 2012 Buick Verano is of utmost urgency due to the serious safety risks involved. Gasoline is not only highly flammable, but a persistent gas odor may indicate a fuel leak, which can lead to a fire hazard if left unchecked. Additionally, inhaling gasoline fumes poses health risks, including dizziness and nausea, which can impair your ability to drive safely. Beyond immediate safety concerns, neglecting this issue can result in more severe problems, such as reduced fuel efficiency or even engine damage over time. Therefore, it is crucial to investigate and resolve any gas smell promptly to protect both your health and the integrity of your vehicle.

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2012 Buick Verano Smells Like Gas - Causes & Solutions