Question: what is the difference between 2 way and 3 way catalytic converter?
Answer: One job is to oxidize the carbon monoxide to turn it into carbon dioxide and the other job is to oxidize the hydrocarbons, or the unused/unburnt fuel, and turn it into carbon dioxide and water. The three- way converter has three jobs, the third job being the reason as to why two-way converters are now obsolete.