Catalytic Converter System

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.

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

The WU-TWC and the TWC convert 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 (ATTACHED TO THE CYLINDER HEAD)

Fig 1: Identifying Warm Up Three Way Catalyst

Courtesy of AMERICAN HONDA MOTOR CO., INC.

TWC (UNDER THE FLOOR)

Fig 2: Identifying Under Floor Three Way Catalyst And Housing

Courtesy of AMERICAN HONDA MOTOR CO., INC.