Exhaust Emission Control System: Operation: Notes
WARNING: This page is about a different car, the 2004 Hyundai Tiburon. However, it is still accessible from the selected car via links, so may be relevant.
Exhaust emissions (CO, HC, NOx) are controlled by a combination of engine modifications and PCM fuel control.
Modifications to the combustion chamber, intake manifold, camshaft and ignition system form the basic control system. Additional control devices include a catalytic converter and the oxygen sensors which monitor mixture control.
These systems have been integrated into a highly effective system which controls exhaust emissions while maintaining good driveability and fuel economy.