Is carbon dioxide in car exhaust fumes?

Yes Carbon dioxide as well as carbon monoxide are present in car exhaust. Carbon dioxide if of less concern the carbon monoxide. A catalytic converter is used to reduce the amount of these chemicals and is a device used to reduce the toxicity of emissions from an internal combustion engine. First widely introduced on series-production automobiles in the U.S. market for the 1975 model year to comply with tightening EPAregulations on auto exhaust, catalytic converters are still most commonly used in motor vehicle exhaust systems.