Can a bad catalytic converter cause lung cancer?

A bad catalytic converter itself does not directly cause lung cancer; however, it can lead to increased emissions of harmful pollutants, such as carbon monoxide, nitrogen oxides, and unburned hydrocarbons. Prolonged exposure to these toxic substances can contribute to respiratory issues and potentially increase the risk of developing lung cancer over time. It's important to address any issues with a catalytic converter to minimize exposure to harmful emissions.