Does the Catalytic Converter Make the Check Engine Light Come On?

Yes, the catalytic converter can trigger the engine control unit to turn on the check engine light. The catalytic converter treats your vehicle’s exhaust. A consequence of this treatment is carbon and sulfur deposits that build up inside of the converter. When the converter gets clogged, it starts to malfunction. This can leave you with an illuminated check engine light on the dashboard as well as the following problems.

Rotten Performance

One of the first things that you may notice is that your engine is lagging and sputtering. In addition, your engine fails to respond quickly when you press down on the accelerator. This rotten engine performance can be caused by a backup of exhaust in the engine that cannot make its way through the clogged catalytic converter. This affects the engine’s ability to produce combustion.

Rotten Fuel Economy

Unfortunately, it also affects the engine’s ability to operate efficiently. Consequently, you will end up with a reduction in the gas mileage that you get out of a full tank of gasoline or diesel fuel. Unfortunately, you will continue to have poor fuel mileage until you have the catalytic converter replaced. Your engine must run efficiently in order to get good gas mileage.

Rotten Egg Odors

Another thing that is rotten is the smell of your vehicle’s exhaust. It will smell like rotten eggs if the catalytic converter has sulfur deposits built up inside of it. This odor can also infiltrate your engine. If you smell rotten eggs while you are driving your automobile or after you get out of it, this is a sign that it is time to replace the catalytic converter with a new one.

Black Exhaust Smoke

You may also notice that you have black exhaust flowing out of the tailpipe. This can be caused by the catalytic converter because it is unable to treat the exhaust. In addition, your automobile’s main computer chip may add extra fuel into the combustion chamber to try to resolve the performance issues that we discussed above. The extra fuel can also create black exhaust.

A Ton of Heat

Finally, another thing you will notice underneath your automobile and in the engine is a ton of heat. This is a sign that the catalytic converter is getting too hot. It is located underneath your automobile, so you will have too much heat underneath the automobile that can rise into the engine.

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