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What Are the Signs of a Faulty Catalytic Converter?

The catalytic converter is in charge of expelling emissions from your vehicle’s motor in a safe manner. If these engine byproducts can’t be emitted properly, your car is at risk of poor efficiency and performance. Read on to learn more about the catalytic converter and how to tell if one has gone bad.

The Process of Catalytic Converters 

The catalytic converter is a major part of the exhaust system that sits underneath most cars. A catalytic converter chemically transforms harmful exhaust emissions like carbon monoxide and other fumes into less toxic vapors. There is a thin metal piece inside the component made to handle this. When the exhaust gasses get pushed through the component, the metal acts as a catalyst to help break down the byproducts.


Over time, the “cat” can break down or get clogged. Below are some of the failing signs of a catalytic converter:

Check Engine Light On

When something goes wrong with the catalytic converter, the oxygen sensors usually pick it up and trigger the engine light to come on your dash.

Problems Starting Engine

A clogged catalytic converter can lead to build ups and excessive exhaust back pressure. As a result, the engine can stall right after start-up.

Lower Fuel Mileage

If you notice your car guzzling up fuel quicker than normal, you may want to figure out what is wrong. In fact, a bad catalytic converter can cause your engine to work harder than it needs to.

Sulfur Smell

When the catalytic converter can’t successfully process the exhaust fumes, it can leave behind a stinky rotten egg smell. 


Unfortunately, the only way to cure the problem is to replace the catalytic converter. The cost of a catalytic converter will vary depending on the make and model of your vehicle, but it can be costlier than other repairs because of the precious metals in the component. 


If you require catalytic converter replacement, please call or visit The Model Garage today.

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