What can indicate a problem with the catalytic converter?

High levels of harmful emissions can indicate a problem with the catalytic converter because this component is essential for reducing the pollutants that are released into the atmosphere by the engine. The catalytic converter facilitates chemical reactions that convert harmful gases, such as carbon monoxide, hydrocarbons, and nitrogen oxides, into less harmful emissions. If the catalytic converter is malfunctioning or damaged, it may not be effective in performing its function. This can result in elevated levels of hazardous emissions that exceed allowable limits.

This condition is often tested during a smog check, where emissions are monitored to ensure that vehicles meet environmental regulations. Significantly higher emissions than what is typical for the vehicle’s make and model can serve as clear evidence that the catalytic converter is not working properly.

In contrast, increased fuel economy, unusual noise from the engine, or a light odor from the exhaust may not directly relate to catalytic converter performance. While they can signal other issues, they are not definitive indicators of catalytic converter problems as elevated emissions levels are.