Katerina Swanson
The fuel tank air filter is a component of Hyundai vehicles that is located near the fuel tank filler pipe or tube. It is a tiny filter canister that connects to the charcoal vapor canister and is responsible for filtering fuel vapors, preventing them from leaking out of the tank. This filter is separate from the regular fuel filter and should be replaced periodically, typically every 30,000 to 40,000 miles, to maintain optimal vehicle performance. While some dealerships may not be familiar with this component, it is important to service it as part of regular maintenance to avoid potential issues with the EVAP system and canister purging.
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What You'll Learn
The fuel tank air filter is located near the fuel tank filler pipe
The fuel tank air filter is located inside the left rear quarter panel, and you will need to remove the left rear wheel to access it. It is a tiny filter canister plugged into a vacuum line for the EVAP system. It is there to prevent dirty air from entering the system during normal tank pressure equalization and canister purging.
The fuel tank air filter is a serviceable part, and it is recommended that it is replaced every 30,000 to 40,000 miles. It is not an expensive part, and it should only wear out when it is clogged. Overfilling the tank may damage the canister, so it is important to be mindful of this when refuelling.
The fuel tank air filter is depicted in the full two-volume shop manual, but there is very little information provided. It may be difficult to access, and you may need to torch some sheet metal to get to it, so it is important to have a fire extinguisher nearby.
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It is a vapor recovery system, made of charcoal
The fuel tank air filter in a Hyundai is a vapor recovery system, made of charcoal. It is located inside the left rear quarter panel near the fuel tank filler tube. The filter is responsible for filtering the air that is intaked into the system, preventing the canister control valve or the purge valve from clogging.
The fuel tank air filter is also known as the canister close valve, which controls the flow of fuel vapour through the charcoal canister. This filter is not to be confused with the fuel filter, which is a screen in the fuel pump inside the tank. The fuel tank air filter is specifically for vapours, not liquid petrol.
The maintenance schedule for a Hyundai recommends replacing the fuel tank air filter every 30,000 miles. However, some owners have reported that their dealerships were unaware of the existence of this filter or how to replace it. It is recommended to replace the filter when it gets clogged, as this can cause issues with the EVAP system.
Overfilling the fuel tank beyond the automatic shut-off of the pump should be avoided, as this can damage the charcoal canister and the filter. When the charcoal gets wet, it loses its effectiveness in filtering fuel vapours.
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It is also the canister close valve, controlling fuel vapour flow
The fuel tank air filter in a Hyundai is part of the vapor recovery system and is made of charcoal. It is located inside the left rear quarter panel near the fuel tank filler tube. The fuel tank air filter is also the canister close valve, controlling the flow of fuel vapour through the charcoal canister.
To access the canister close valve, you need to remove the left rear wheel and the fender liner. You will then see the valve, which has a small-diameter hose going in and out of it, along with an electrical connection. The canister close valve is responsible for controlling the flow of fuel vapour. It allows the vapour to flow through the charcoal canister, which absorbs and filters out any harmful vapours before they are released into the atmosphere.
The charcoal canister is an essential component of the evaporative emissions control system, which is designed to reduce harmful vapours from escaping from the fuel system. Overfilling the fuel tank can destroy the canister, as the liquid fuel can soak into the canister and damage the charcoal granules. This will then require a replacement of the entire evaporative system.
The canister close valve is a replaceable part, with some Hyundai models requiring replacement at specific maintenance intervals. For example, the 2005 Tucson owner's manual suggests replacing the canister close valve at 45,000 km. It is important to refer to the specific maintenance schedule for your Hyundai model to determine the appropriate replacement interval for this part.
The canister close valve is available as a genuine OEM part from Hyundai, ensuring compatibility and optimal performance for your vehicle.
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It is not the same as the fuel filter
The fuel tank air filter in a Hyundai is not the same as the fuel filter. The fuel tank air filter is a canister close valve that controls the flow of fuel vapour through the charcoal canister. It is located near the fuel tank filler pipe, under the car, and is accessible by removing the left rear wheel and the fender liner.
The fuel filter, on the other hand, is a screen located inside the fuel pump, within the fuel tank. It is responsible for filtering the liquid petrol before it reaches the engine. The fuel filter can become clogged, restricting the flow of petrol and affecting the performance of the vehicle, particularly during acceleration.
The fuel tank air filter is not considered a serviceable item by some mechanics, who believe it can only be changed by replacing the entire fuel pump. However, some Hyundai owners have reported being able to replace the fuel tank air filter themselves, although it is a challenging process that may require torching sheet metal to access the filter.
The maintenance schedule for a Hyundai typically recommends replacing the fuel tank air filter every 30,000 to 45,000 miles, while the fuel filter may need to be replaced at 60,000 km. It is important to note that the terminology used by Hyundai can be confusing, and the fuel tank air filter is sometimes referred to as the vapor canister or EVAP canister air filter.
In summary, the fuel tank air filter and the fuel filter are two distinct components in a Hyundai's fuel system, with different functions, locations, and maintenance requirements.
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It should be replaced every 30,000-40,000 miles
The fuel tank air filter in a Hyundai is part of the vapor recovery system, and it is made of charcoal. It is located inside the left rear quarter panel near the fuel tank filler tube. This filter controls the flow of fuel vapour through the charcoal canister.
It is recommended that you replace the fuel tank air filter every 30,000-40,000 miles. This is because the air filter will eventually get clogged, and this will affect the performance of your car. For example, if your fuel tank air filter is clogged, your car may struggle at low speeds and fail to accelerate. A clogged air filter will also affect your MPG rating, and you may be at risk of other vehicle malfunctions.
It is important to note that your driving habits and weather conditions will influence how long your current air filter will last. For example, if you frequently drive on gravel roads, in heavy traffic, or in hot weather, your air filter will wear out quicker.
Some Hyundai owners have reported confusion over the fuel tank air filter, with some dealerships and mechanics unsure of what it is or how to replace it. This may be because it is difficult to access, requiring you to torch some sheet metal to get to it.
In addition, the fuel tank air filter is not the same as the fuel filter, which is a screen in the fuel pump inside the tank. The fuel filter can also get clogged, but this is rare.
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Frequently asked questions
A fuel tank air filter is a tiny filter canister that is located inside the left rear quarter panel near the fuel tank filler pipe. It is a part of the evaporative canister system and is responsible for filtering the air that is intaked into the system, preventing the canister control valve or the purge valve from clogging.
It is recommended to replace your Hyundai's fuel tank air filter every 30,000 miles. However, some owners' manuals suggest replacement at 45,000km or 60,000km. It is also recommended to replace the filter if it becomes clogged.
Yes, it is possible to replace the fuel tank air filter yourself. The process involves removing the rear left wheel house, disconnecting the canister close valve wiring connector and the vapor hose, removing the old filter, and installing a new one. However, it is important to note that accessing the filter may require removing some sheet metal, so it is advisable to have a fire extinguisher nearby.
