Does a Damaged Catalytic Converter Affect Engine Performance?
2 Answers
A damaged catalytic converter does affect engine performance. The catalytic converter is a component installed in the front section of the vehicle's exhaust pipe, designed to purify exhaust gases. After the vehicle's exhaust is emitted, it passes through the catalytic converter, which reduces the content of harmful substances in the exhaust. If the catalytic converter is damaged, it can cause the vehicle's emissions to exceed standards, affecting the annual inspection. There are oxygen sensors both before and after the catalytic converter. The role of the oxygen sensor is crucial. The oxygen sensor located after the catalytic converter is primarily used to detect whether the catalytic converter is damaged. If the data transmitted to the ECU by the front and rear oxygen sensors is identical, it indicates that the catalytic converter is damaged and needs to be replaced immediately.
Well, I'm an auto mechanic and often come across vehicles with faulty catalytic converters. Once it gets clogged, the exhaust pipe is blocked, causing poor engine exhaust flow, increased back pressure, and a noticeable drop in power. The car feels sluggish when accelerating, especially during starts or uphill climbs. Fuel consumption also rises because the engine has to work harder. In severe cases, the check engine light comes on, affecting overall vehicle performance. I recommend early inspection, cleaning, or replacement of the catalytic converter—don't wait until the engine overheats or carbon buildup worsens. Regular use of quality gasoline and routine maintenance can prevent this issue and keep power output smooth. In practice, many owners only come in for repairs after experiencing poor performance on highways, which delays a lot of things.
