What poisonous gas is found in the exhaust fumes of car engines?

The toxic gar expelled from the reaction between gasoline and oxygen in the vehicle's engine is both Carbon dioxide and monoxide

The poisonous gases found in the exhaust fumes of car engines are the products of combustion which are carbon dioxide and carbon monoxide. They are known to be toxic and carcinogenic. Hope this answers the question. Have a nice day.

I believe the answer is Carbon Monoxide. There are a lot of different poisonous gases but carbon monoxide is the most popular.

Carbon Monoxide is the poisonous gas that is found in the exhaust fumes of car engines. A person should never sit in a closed garage, building, etc without adequate ventilation. The carbon monoxide can kill a person very fast in these types of situations.