2017 Chevrolet Volt Smells Like Gas

Identifying Potential Causes of Gas Smells in Your 2017 Chevrolet Volt and How to Address Them

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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 2017 Chevrolet Volt 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 2017 Chevrolet Volt 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 are the steps to diagnose a gas smell in a 2017 Chevrolet Volt?

When diagnosing a gas smell in your 2017 Chevrolet Volt, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by visually inspecting the area beneath your vehicle for any obvious signs of fuel leaks, such as puddles or drips. Next, ensure that the fuel cap is securely tightened, as a loose cap can often lead to gas odors. If the smell persists, examine the fuel lines for any visible cracks or damage, as these can be common culprits. Additionally, inspect the fuel injectors for leaks, as issues here can also contribute to the odor. Don't overlook the EVAP system, which is designed to contain fuel vapors; any malfunction in this system could be the source of the smell. Lastly, check the exhaust system for leaks, as these can sometimes be confused with fuel odors. If you are unable to identify the source after these checks, it may be time to consult a mechanic for a professional evaluation. This methodical approach not only helps in pinpointing the issue but also ensures that you address the simplest problems first, potentially saving time and money.

What could be causing a gas smell in my 2017 Chevrolet Volt?

If you notice a gas smell in your 2017 Chevrolet Volt, it’s crucial to investigate the underlying causes to ensure both safety and vehicle performance. One common issue could be fuel leaks, which may stem from damaged fuel lines or faulty fuel injectors, leading to gasoline escaping into the engine compartment or under the vehicle. Additionally, problems with the evaporative emissions system can cause fuel vapors to escape, contributing to the odor. Another area to check is the exhaust system; leaks or malfunctions, particularly in the catalytic converter, can also result in a gas smell inside the cabin. Overfilling the gas tank is another simple yet often overlooked cause, as it can lead to gasoline spilling and creating a strong odor. Lastly, ensure that your fuel cap is secure and in good condition, as a loose or damaged cap can allow vapors to escape. Addressing these issues promptly is essential, and while some may be manageable for a DIY enthusiast, others may require professional assistance to ensure a thorough and safe resolution.

How urgent is it to address a gas smell in a 2017 Chevrolet Volt?

When you detect a gas smell in your 2017 Chevrolet Volt, it is imperative to act swiftly due to the serious safety risks involved. A gas odor often signals a fuel leak, which can lead to catastrophic consequences such as fire or explosion if left unchecked. Moreover, the presence of gasoline fumes can infiltrate the vehicle's cabin, posing health hazards to you and your passengers. Given that gasoline is highly flammable, any leakage significantly heightens the risk of a fire, particularly in the confined space of a car. Therefore, if you notice a gas smell, it is crucial to cease driving immediately and seek the expertise of a qualified mechanic. Promptly addressing this issue not only safeguards your health but also protects your vehicle from potential damage, making it essential to investigate and resolve the source of the gas smell without delay.

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