Exhaust Emission Control System
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
Operation and necessary maintenance of the exhaust emission control devices used on this engine are covered in the INTRODUCTION -- FUSION HYBRID, MILAN HYBRID & MKZ HYBRID article.