1999 Toyota Camry Smells Like Gas

Identifying Potential Causes of Gas Smells in Your 1999 Toyota Camry and Safety Precautions to Take

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Reviewed by
Andrew Hajjar
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 1999 Toyota Camry 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 1999 Toyota Camry 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.

What are the steps to diagnose a gas smell in a 1999 Toyota Camry?

To effectively diagnose a gas smell in your 1999 Toyota Camry, start with the simplest checks before moving on to more complex assessments. Begin by inspecting the fuel cap; ensure it is tightly secured, as a loose cap can easily cause gas odors. Next, look for visible leaks under the vehicle, focusing on the fuel lines and tank for any signs of damage or wear. If no obvious leaks are found, examine the fuel injector O-rings and fuel filter for any signs of deterioration or clogs, as these components can also contribute to gas smells. Additionally, check the charcoal canister, which plays a crucial role in managing fuel vapors; any damage here could lead to odors inside the car. If these initial checks do not reveal the source of the smell, it may be time to consult a mechanic for a more thorough inspection. By following this diagnostic approach, you can systematically identify and address the issue, ensuring your vehicle remains safe and functional.

What are the common causes of a gas smell in a 1999 Toyota Camry?

When you notice a gas smell in your 1999 Toyota Camry, it's important to investigate the potential causes to maintain safety and vehicle integrity. A common culprit is a fuel leak, which can originate from the fuel tank, lines, or injectors, leading to gasoline vapors escaping into the cabin. Additionally, a faulty fuel cap—whether it's loose, damaged, or missing—can disrupt the pressure in the fuel system, allowing odors to permeate the vehicle. Issues with the evaporative emissions control system, such as a malfunctioning charcoal canister or purge valve, can also contribute to gas smells. Moreover, leaks in the exhaust system, particularly around the exhaust manifold or catalytic converter, may produce similar odors. Lastly, engine-related problems, including a rich fuel mixture or faulty sensors, can result in a noticeable gas smell. It's vital to address these issues promptly, as they not only affect your car's performance but also pose safety risks associated with fuel leaks.

How urgent is it to address the gas smell in my 1999 Toyota Camry?

Addressing a gas smell in your 1999 Toyota Camry is not just a matter of convenience; it is an urgent safety concern that should not be overlooked. Gas leaks can lead to catastrophic consequences, including the risk of fire, which poses a serious threat to both you and others nearby. Additionally, the inhalation of gas fumes can result in immediate health issues such as dizziness and nausea, and prolonged exposure can lead to more severe health complications. Beyond the immediate dangers, neglecting this issue can exacerbate existing problems within your vehicle, leading to costly repairs down the line. Therefore, it is imperative to take action as soon as you detect a gas smell, ensuring both your safety and the longevity of your car.

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