How To Fix a Catalytic Converter That Is Clogged (Answered!)

If your catalytic converter is clogged, you may be wondering how to fix it. A clogged catalytic converter can cause a lot of problems for your car, including decreased fuel efficiency and increased emissions.

In this blog post, we will discuss some tips and tricks that can help you unclog your catalytic converter and get your car running like new again!

To fix a catalytic converter that is clogged, you will need to a pour full bottle of a catalytic converter and about 20 gallons into the gas tank and then drive the vehicle for about 150 miles.

Key Takeaway

How To Fix a Catalytic Converter That Is Clogged

  • Get a catalytic converter cleaner
  • Scan the vehicle with an OBD2 scanner. You should get a P0420 code suggesting that the cat is clogged.
  • Add about 1.25oz of cat cleaner to a gallon of fuel. For a full tank, it is usually 20oz cat cleaner.
  • Drive the vehicle for 150 miles, or let it idle for 30 minutes.

What Does The Catalytic Converter Do?

A catalytic converter is a device that uses a catalyst to convert exhaust emissions from an internal combustion engine into less harmful substances. Catalytic converters are made from several different materials, but the most important component is a catalyst. The catalyst is usually made from platinum or palladium, and it helps to convert the exhaust fumes into less harmful gases. The other parts of the converter help to keep the catalyst in place and protect it from being damaged by high temperatures.

The main function of a catalytic converter is to reduce the emission of pollutants. It does this by chemically converting the pollutants into harmless gases.

There are three main types of catalytic converters: oxidation catalysts, reduction catalysts, and three-way catalysts. Oxidation catalysts help to convert carbon monoxide and hydrocarbons into carbon dioxide and water vapor. Reduction catalysts help to convert nitrogen oxides into nitrogen gas and oxygen gas. Three-way catalysts are a combination of both oxidation and reduction catalysts and help to reduce all three types of pollutants.

The first step in making a catalytic converter is to create the honeycomb structure that will serve as the foundation for the catalyst material. This structure can be made from a variety of materials, but the most common type is ceramic. Once the honeycomb structure has been created, it is coated with a thin layer of platinum using a process called chemical vapor deposition.

Catalytic converters are an important part of a car’s emission control system. They are required by law in many countries.

This is how a catalytic converter works to clean up the exhaust fumes from your car.

How To Fix a Catalytic Converter That Is Clogged

If your catalytic converter is clogged, you’re going to want to take care of the problem as soon as possible. Not only will a clogged converter cause your car to run poorly, but it can also lead to more serious problems down the road. Here is how to fix a catalytic converter that is clogged:

1. Required items

2. Scan your vehicle for error codes

How To Fix a Catalytic Converter That Is Clogged

If you have a check engine light and you suspect that your catalytic converter is triggering it, you need to verify it. Catalytic converters are very expensive. This is why before you replace your clogged catalytic converter, you need to try and fix it. A catalytic converter can trigger an error code when it loses only 5% of its efficiency. This is why we always try to clean it first.

OBD scanners are used to diagnose issues with your vehicle. They can be used to check for engine codes, transmission codes, and more. OBD scanners can also be used to reset your check engine light. Here is a step-by-step guide on how to use an OBD scanner:

First, you will need to purchase an OBD scanner (see the price on amazon.comOpens in a new tab.

Once the scanner is connected, you will need to turn on your ignition (do not start the engine). The scanner will then begin scanning your vehicle. It may take a few minutes for the scan to complete. Once it is finished, you will be able to view the results on the screen of the scanner.

A trouble code associated with a clogged catalytic converter is P0420 – Catalyst efficiency below threshold. If you see this code, you have a clogged catalytic converter and you need to fix it.

3. Pour the cleaner into the gas tank

How To Fix a Catalytic Converter That Is Clogged

Catalytic converters can become clogged for a variety of reasons. One common reason is the build-up of carbon deposits on the catalyst surface. This can happen if the engine is running too rich or if there is an oil leak. Another reason catalytic converters can get clogged is from the use of leaded gasoline. Lead deposits can accumulate on the catalyst and eventually reduce its effectiveness.

If a catalytic converter becomes clogged, it will usually cause the engine to run poorly. The engine may misfire, have reduced power, or produce excessive amounts of exhaust fumes.

To fix a clogged catalytic converter, you need to pour a catalytic converter cleaner into the gas tank. Add a full bottle of cleaner to 20 gallons of fuel or 1.25oz per gallon of fuel.

A catalytic converter cleaner works by breaking down the carbon deposits that have built up on the catalyst, allowing it to work more effectively. When these carbon deposits are broken down, they are converted into gases that can then be expelled from the engine through the exhaust system. This cleanser is typically added to your fuel tank and will be drawn into the engine as you drive.

4. Drive the car to get the cleaner working

With the catalytic converter cleaner poured into the gas tank, you can either drive the vehicle for 150 miles or rev the car to 2500 RPMs for about 30 minutes. Personally, I prefer driving the car because sitting in one place for about 30 minutes is way too boring.

When you drive the car, the catalytic converter cleaner that you added to the gas tank will travel through the fuel lines and into the combustion chamber. From the combustion chamber, it will go to the exhaust outlet manifold and directly into the catalytic converter. When the cleaner reaches the catalytic converter, it will start and clean the carbon buildup.

Inside the catalytic converter, there is a honeycomb structure that is designed to trap any large particles. This is where the carbon deposits build up the most. Once the catalytic converter is cleaned, the check engine light will disappear.

Can a Clogged Catalytic Converter Cause Engine Damage?

A clogged catalytic converter can cause engine damage if the engine is not receiving enough oxygen. The catalytic converter helps to convert exhaust gases into less harmful substances. If the converter becomes clogged, it can cause the engine to run lean, meaning that there is not enough air and fuel mixture in the cylinders. This can lead to serious engine problems such as piston damage and overheating.

If your car’s catalytic converter becomes clogged, it’s important to have it cleaned or replaced as soon as possible. Ignoring the problem could result in expensive engine damage down the road.

There are many causes of clogged catalytic converters, but the most common is the use of leaded gasoline. Leaded types of gasoline can deposit lead on the catalyst, which can then poison it and reduce its efficiency.

Another common cause of clogged catalytic converters is the use of oil-based lubricants on spark plugs. These lubricants can build up on the catalyst and eventually block it. Finally, any fuel or oil that leaks onto the exhaust system can coat the catalyst and reduce its efficiency.

If you don’t fix the catalytic converter, your car will eventually stop running. The engine will become less and less efficient, and eventually, it will just stall out. Your car will also produce a lot of smoky exhaust. If you live in an area with environmental regulations, you could be fined for driving a car with a faulty catalytic converter.

In extreme cases, the catalytic converter can catch fire, which is very dangerous. So it’s definitely not worth risking your safety or your wallet by driving around with a broken catalytic converter. Get it fixed as soon as possible!

Vide Polowenski

General Mechanic with over 20 years of experience specializing in General mechanics, exhaust systems, fuel systems, and fuse-related problems.

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