What is primarily monitored by the I/M Monitor?

The I/M Monitor primarily focuses on emission control devices because these components are essential for minimizing pollutants released from vehicles. Emission control devices include catalytic converters, oxygen sensors, and evaporative emission control systems, all of which help in reducing harmful emissions that can contribute to air pollution. The effective operation of these devices ensures that the vehicle meets regulatory emissions standards.

While the fuel system, electrical systems, and air intake system are important aspects of vehicle operation, they do not have the same direct impact on emissions control as the devices specifically designed for that purpose. By concentrating on the performance and functionality of emission control devices, the I/M Monitor plays a crucial role in enforcing compliance with environmental regulations and promoting cleaner air.