Emissions

This eLearning course explains the five exhaust gases (HC, CO, O2, CO2 and NOx), how each is formed, and the relationship between the gases. Emission control system operation is discussed including positive crankcase ventilation, catalytic converters, EGR, VVT, air injection, evaporative emissions, and more. Basic diagnostic methods are explained for each system and learning checks are used to reinforce the concepts. This course also covers theory and operations of the catalytic converter as well as identifies a testing process to avoid replacing a good component.