Hyundai Elantra (CN7): Emission Control System / Exhaust Emission Control System

Repair procedures Removal1.Turn the ignition switch OFF and disconnect the negative (-) battery cable. 2.Disconnect the vent hose (A).3.Remove the fuel tank air filter (A) by rotating it 30 degrees.

DescriptionExhaust emissions (CO, HC, NOx) are controlled by a combination of engine modifications and the addition of special control components.Modifications to the combustion chamber, intake manifold, camshaft and ignition system form the basic control system.