2019 Cadillac XT5 Smells Like Gas

Diagnosing Fuel Odor Issues in Your 2019 Cadillac XT5 and Essential Safety Precautions

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Reviewed by
Devin Cabugcal
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 2019 Cadillac XT5 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 2019 Cadillac XT5 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 2019 Cadillac XT5?

When dealing with a gas smell in your 2019 Cadillac XT5, it's essential to approach the diagnosis methodically, starting with the simplest potential issues before moving on to more complex ones. Begin by checking for visible fuel leaks around the vehicle, as this is often the most straightforward indicator of a problem. Next, inspect the fuel lines and connections for any signs of wear or damage that could lead to leaks. If everything appears intact, focus on the fuel injector, as a malfunctioning injector can emit gas odors. Utilizing a diagnostic scanner can also be beneficial; it will help you identify any error codes related to the fuel system that may not be immediately visible. Additionally, examine the evaporative emissions system, as issues here can contribute to gas smells. Don’t overlook the exhaust system, as leaks can sometimes allow gas odors to enter the cabin. Finally, ensure that the gas cap is securely sealed after refueling, as a loose cap can release gas vapors. By following this structured approach, you can effectively diagnose and address the source of the gas smell in your vehicle.

What could be causing a gas smell in my 2019 Cadillac XT5?

If you're detecting a gas smell in your 2019 Cadillac XT5, it's essential to understand the common problems that could be at play. One of the most serious concerns is a fuel leak, which can stem from various components like fuel injectors, fuel lines, or even the fuel tank itself. This situation not only poses a risk of fire but also requires immediate attention. Another potential culprit 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, issues within the exhaust system, such as leaks or a malfunctioning catalytic converter, can sometimes produce a gas-like smell inside the cabin. The evaporative emissions system, designed to control fuel vapor release, may also be malfunctioning, contributing to the problem. Lastly, overfilling your gas tank can cause fuel to spill, creating an unpleasant smell. For those inclined to DIY, it's crucial to inspect these areas carefully, but remember that if the issue persists or if you suspect a fuel leak, consulting a qualified mechanic is the safest course of action.

How urgent is it to address a gas smell in a 2019 Cadillac XT5?

When you detect a gas smell in your 2019 Cadillac XT5, the urgency to address the issue cannot be overstated. Gasoline is not only highly flammable, but its fumes can also pose serious health risks, including dizziness and nausea, which can impair your ability to drive safely. Ignoring this warning sign may lead to a dangerous situation, such as a fire or explosion, especially if there is an actual fuel leak. Furthermore, neglecting the problem can result in significant damage to your vehicle's fuel system, leading to costly repairs that could have been avoided with timely action. Additionally, a gas leak can have detrimental effects on the environment, contributing to pollution and ecological harm. Therefore, if you notice a gas smell, it is imperative to take immediate action, whether that means conducting a thorough inspection yourself or seeking professional help to ensure your safety and the integrity of your vehicle.

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2019 Cadillac XT5 Smells Like Gas: Causes & Solutions