2021 Toyota Camry Smells Like Gas

Identifying Potential Causes of Gas Smells in Your 2021 Toyota Camry and Safety Precautions to Take

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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 2021 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 2021 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.

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 potential causes for a gas smell in a 2021 Toyota Camry, and how should I diagnose the issue?

When diagnosing a gas smell in your 2021 Toyota Camry, it's essential to adopt a systematic approach that begins with the simplest potential causes before moving on to more complex issues. Start by inspecting for any visible fuel leaks under the vehicle or around the fuel tank, as this is often the most straightforward explanation. Next, check the fuel injectors for signs of malfunction, such as poor fuel economy or rough idling, which could indicate a faulty injector. Don’t overlook the evaporative emissions control system; ensure the gas cap is tightly sealed and examine the system for any leaks. Additionally, inspect the exhaust system for any leaks or damage, as issues here can also contribute to a gas odor. Lastly, consider whether you may have overfilled the gas tank, which can lead to fuel spillage. By following this diagnostic approach, you can effectively narrow down the source of the gas smell and determine whether you can resolve the issue yourself or if professional assistance is needed.

What could be causing a gas smell in a 2021 Toyota Camry?

When you notice a gas smell in your 2021 Toyota Camry, it’s essential to pinpoint the cause to maintain safety and vehicle functionality. A fuel leak is often the primary suspect, which could originate from a faulty fuel injector, a damaged fuel line, or even a compromised fuel tank. Additionally, a loose or damaged fuel cap can lead to gas vapors escaping, resulting in a noticeable odor. Another area to consider is the evaporative emissions system, which is designed to contain fuel vapors; any malfunction here can cause gas smells to permeate the cabin. Moreover, an exhaust system leak may allow harmful fumes to enter the vehicle, contributing to the unpleasant odor. Lastly, engine-related issues, such as a malfunctioning sensor or problems with the combustion process, can also produce a gas smell. If you encounter this issue, it’s crucial to conduct a thorough inspection or seek assistance from a qualified mechanic to diagnose and resolve the problem swiftly, ensuring both your safety and the integrity of your vehicle.

How urgent is it to address a gas smell in a 2021 Toyota Camry?

When you detect a gas smell in your 2021 Toyota Camry, it is essential to act swiftly due to the serious implications associated with this issue. The presence of gasoline fumes can indicate a fuel leak, which not only poses a significant fire hazard but also threatens your health through harmful inhalation of toxic vapors. Ignoring this warning can lead to severe consequences, including potential explosions or long-term health complications from exposure to fumes. Additionally, a gas smell may signal underlying problems within the fuel system that, if left unaddressed, could escalate into costly repairs and further damage to your vehicle. To ensure your safety and the longevity of your car, it is crucial to consult your owner's manual or reach out to a certified Toyota service center immediately. Taking prompt action not only safeguards your well-being but also helps maintain the performance and reliability of your vehicle.

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