2013 Chevrolet Impala Smells Like Gas

Common Causes of Gas Smells in Your 2013 Chevrolet Impala and Essential Safety Measures to Take

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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 2013 Chevrolet Impala 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 2013 Chevrolet Impala 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 2013 Chevrolet Impala?

When diagnosing a gas smell in your 2013 Chevrolet Impala, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex issues. Start by inspecting the area beneath your vehicle for any visible fuel leaks, as this can provide immediate insight into potential problems. Next, ensure that the fuel cap is securely fastened, 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, as well as the fuel injector O-rings, which can deteriorate over time and lead to gas smells. Don’t overlook the fuel tank itself; check for any punctures or rust that could be contributing to the issue. Additionally, consider the condition of the evaporative emissions system and the charcoal canister, as these components can also harbor fuel vapors. If these initial checks do not reveal the source of the smell, it may be time to consult a professional mechanic for a comprehensive inspection. By methodically assessing these areas, you can effectively identify and address the source of the gas smell in your vehicle.

What could be causing my 2013 Chevrolet Impala to smell like gas?

If your 2013 Chevrolet Impala is emitting a gas smell, it’s essential to investigate the underlying causes to ensure both safety and vehicle performance. One common issue could be a leaking fuel injector, which can lead to fuel seeping into the engine compartment, creating a noticeable odor. Additionally, inspect the fuel lines for any signs of wear or damage, as leaks in these lines can also contribute to the smell. Another simple check involves the gas cap; if it’s loose, damaged, or missing, it can allow fuel vapors to escape, resulting in a gas odor inside the car. Furthermore, problems with the evaporative emissions system, such as a faulty charcoal canister or purge valve, may also be responsible for the smell, necessitating a closer examination. Lastly, a leak in the fuel tank itself is a serious concern that should be addressed immediately to prevent potential hazards. By systematically checking these areas, you can identify the source of the gas smell and take appropriate action, whether that involves tightening the gas cap or seeking professional help for more complex issues.

How urgent is it to address a gas smell in a 2013 Chevrolet Impala?

Addressing a gas smell in your 2013 Chevrolet Impala is not just a matter of convenience; it is a critical safety concern 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 issues, including dizziness, headaches, and nausea, which can escalate with prolonged exposure. Beyond the immediate dangers, ignoring a gas smell can result in further damage to your vehicle's components, leading to expensive repairs down the line. Therefore, if you notice a gas odor, it is imperative to seek professional assistance to identify and rectify the source of the leak promptly, ensuring both your safety and the longevity of your vehicle.

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