2021 Land Rover Discovery Smells Like Gas

Addressing Gas Smells in Your 2021 Land Rover Discovery

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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 2021 Land Rover Discovery 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 Land Rover Discovery 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 steps should I take to diagnose the gas smell in my 2021 Land Rover Discovery?

When diagnosing a gas smell in your 2021 Land Rover Discovery, it's essential to adopt a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Start by visually inspecting the area beneath your vehicle for any signs of fuel leaks, such as puddles or drips, which can indicate a problem within the fuel system. Next, ensure that the fuel cap is securely tightened, as a loose or damaged cap can allow gas odors to escape. Following this, examine the fuel lines for any visible cracks or damage, as these can lead to leaks. If the smell persists, consider checking the fuel injector, as a malfunctioning injector may also contribute to gas odors. Additionally, inspect the fuel tank for any signs of corrosion or damage that could be causing leaks. If you are unable to identify the source of the smell or suspect a more serious issue, it is advisable to consult a qualified mechanic for a comprehensive inspection. By following this diagnostic approach, you can effectively pinpoint the cause of the gas smell and take appropriate action to resolve the issue.

What are the common problems that could cause a gas smell in a 2021 Land Rover Discovery?

If you detect a gas smell in your 2021 Land Rover Discovery, it’s crucial to investigate the source promptly, as it could indicate several underlying issues. One of the most common culprits is a fuel leak, which can occur anywhere in the fuel system, leading to a noticeable odor both inside and outside the vehicle. Additionally, a faulty fuel injector may allow fuel to escape into the engine compartment, contributing to the smell. Inspecting the fuel tank for any signs of damage, such as cracks or holes, is also essential, as these can release gasoline fumes. Another area to consider is the evaporative emissions system, which is designed to manage fuel vapors; any malfunction here can result in a gas odor. Lastly, don’t overlook the exhaust system, as leaks can sometimes allow gas fumes to enter the cabin. Addressing these issues quickly is vital for safety, and while some DIY diagnostics can be performed, consulting a qualified mechanic is advisable for a thorough inspection and repair.

How urgent is it to address a gas smell in a 2021 Land Rover Discovery?

When you detect a gas smell in your 2021 Land Rover Discovery, it is imperative to act swiftly due to the serious implications of neglecting this warning sign. The presence of gasoline fumes not only poses a significant fire hazard but also raises health concerns, as inhaling these fumes can lead to dizziness, headaches, and other serious health issues. Moreover, a gas smell may indicate a fuel leak or malfunctioning component, which, if left unaddressed, could result in extensive damage to your vehicle's fuel system and lead to costly repairs. Therefore, it is crucial to prioritize a professional inspection to accurately diagnose and resolve the issue. Delaying action could exacerbate the problem, making it essential to treat any gas smell as an urgent matter for your safety and the longevity of your vehicle.

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