2017 Toyota 86 Smells Like Gas

Identifying the Causes of Gas Smells in Your 2017 Toyota 86 and How to Address Them Safely

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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 2017 Toyota 86 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 Toyota 86 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.

When the fuel filter begins to clog, the engine suffers from fuel starvation. This will cause a significant reduction in power and may also cause a misfire. These conditions may be intermittent, or constant and worsen over time. As the issue progresses, the engine may being to stall immediately after starting, fail to start, hesitate under throttle, or stall at particular angles on hills.

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 2017 Toyota 86?

When diagnosing a gas smell in your 2017 Toyota 86, it's crucial to take a methodical approach that begins with the simplest checks before progressing to more complex diagnostics. Start by inspecting the area beneath 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. After that, examine the fuel lines for any cracks, holes, or loose connections, as these are common sources of leaks. Additionally, check the fuel injectors to ensure they are functioning properly, since faulty injectors can also lead to gas leaks. Don’t overlook the fuel tank itself; look for any signs of damage or corrosion that could contribute to the smell. If these initial checks do not reveal the source of the odor, it may be wise to consult a mechanic who can conduct a more thorough inspection using specialized tools. By following this diagnostic approach, you can effectively identify and address the source of the gas smell in your vehicle.

What could be causing my 2017 Toyota 86 to smell like gas?

If your 2017 Toyota 86 is emitting a gas smell, it’s crucial to identify the underlying issues to ensure both safety and vehicle performance. One common culprit is a leaking fuel injector, which can release fuel vapors into the engine compartment, leading to a noticeable odor. Additionally, faulty fuel lines may be damaged or corroded, allowing fuel to escape and create a hazardous environment. Another simple yet often overlooked issue could be a loose or damaged gas cap; ensuring it is properly secured can sometimes eliminate the smell. More serious concerns include a leak in the fuel tank itself, which poses significant safety risks and should be addressed immediately by a professional. Lastly, problems with the evaporative emissions system, such as a malfunctioning charcoal canister or purge valve, can also contribute to gas odors. If you detect a gas smell, it’s advisable to conduct a thorough inspection or consult a qualified mechanic to diagnose and resolve the issue promptly.

How urgent is it to address a gas smell in my 2017 Toyota 86?

Addressing a gas smell in your 2017 Toyota 86 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 your car. Moreover, the health implications of inhaling gas fumes are significant, with symptoms ranging from dizziness to severe respiratory issues. If you notice a gas smell, it is essential to act quickly. Start by inspecting the fuel lines and connections for any visible leaks or damage, as these are common culprits. Additionally, check the fuel tank and the area around it for any signs of fuel accumulation. If you are not comfortable performing these checks or if the smell persists, it is crucial to seek professional assistance. Ignoring the issue not only jeopardizes your safety but can also lead to more extensive and costly repairs down the line. Prioritizing a prompt response to a gas smell will help ensure your safety and the longevity of your vehicle.

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Why Your 2017 Toyota 86 Smells Like Gas - Causes & Solutions