2013 Lexus ES350 Smells Like Gas

Identifying Potential Causes of Gas Smells in Your 2013 Lexus ES350 and Essential Safety Measures

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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 Lexus ES350 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 Lexus ES350 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 and diagnostic steps for a gas smell in a 2013 Lexus ES350?

When faced with a gas smell in your 2013 Lexus ES350, it's crucial to approach the diagnosis methodically to identify the root cause effectively. Start with a thorough visual inspection of the vehicle, paying close attention to the fuel lines, fuel injectors, and the fuel tank for any signs of leaks. A common yet often overlooked issue is the fuel cap; ensure it is securely tightened and in good condition, as a loose or damaged cap can allow fuel vapors to escape. Next, utilize an OBD-II scanner to check for any diagnostic trouble codes that may indicate problems within the fuel system or emissions components. Inspect the evaporative emissions system, focusing on the charcoal canister and purge valve, as these can develop leaks that contribute to the gas odor. Additionally, examine the exhaust system for any cracks or leaks that could allow fumes to enter the cabin. Finally, monitor the engine's performance for symptoms like rough idling or poor fuel efficiency, which may suggest that the engine is running too rich and releasing unburned fuel. By following these diagnostic steps, you can pinpoint the issue and determine whether it requires a simple fix or professional assistance.

What could be causing a gas smell in my 2013 Lexus ES350?

If you're detecting a gas smell in your 2013 Lexus ES350, it's crucial to understand the common problems that could be at play. One of the primary culprits is a fuel leak, which can occur from various points in the fuel system, including fuel injectors, lines, or the tank itself. This situation not only poses a risk of fire but also requires immediate attention. Another potential issue could be a faulty fuel cap; if it's loose, damaged, or missing, it can allow fuel vapors to escape, leading to that unmistakable gas odor. Additionally, problems with the evaporative emissions system, which is responsible for capturing and recirculating fuel vapors, may also be to blame. Components like the charcoal canister or purge valve can fail, resulting in a gas smell inside the vehicle. Furthermore, an exhaust system leak, such as a crack in the exhaust manifold or a damaged catalytic converter, can sometimes mimic a gas odor. Lastly, overfilling your gas tank can lead to fuel spillage, contributing to the smell. If you notice this issue, it's advisable to conduct a thorough inspection or consult a qualified mechanic to ensure your vehicle remains safe and functional.

How urgent is it to address the gas smell in my 2013 Lexus ES350?

Addressing a gas smell in your 2013 Lexus ES350 is not just a matter of inconvenience; it is a critical safety concern that requires immediate attention. The presence of gasoline fumes can indicate a leak, which poses a significant fire hazard that endangers both you and other drivers on the road. Additionally, prolonged exposure to gasoline vapors can lead to serious health issues, including dizziness, headaches, and nausea, making it essential to prioritize your well-being. Ignoring this warning sign can escalate the problem, potentially resulting in more extensive and costly repairs down the line. Therefore, if you detect a gas smell, it is crucial to act swiftly by consulting a professional mechanic who can accurately diagnose and resolve the issue, ensuring your vehicle remains safe and reliable.

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Causes of Gas Smell in 2013 Lexus ES350 | RepairPal