Catalytic Converter System

Warm Up Three Way Catalytic Converter (WU-TWC) and Three Way Catalytic Converter (TWC) 

The WU-TWC/TWC converts hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx) in the exhaust gas to carbon dioxide (CO₂ ), nitrogen (N₂ ), and water vapor.

WU-TWC 

Fig 1: Identifying WU-TWC

Courtesy of AMERICAN HONDA MOTOR CO., INC.

TWC 

Fig 2: Identifying TWC

Courtesy of AMERICAN HONDA MOTOR CO., INC.