Which emission control device must be intact and functional for an emissions inspection?

The evaporative emissions system plays a critical role in controlling harmful emissions that can escape from the fuel system of a vehicle. This system is designed to capture and store fuel vapors from the fuel tank, ensuring that they do not enter the atmosphere. During an emissions inspection, the integrity and functionality of this system must be verified to ensure that it is working properly to minimize environmental pollution.

While the other devices mentioned are also important for overall emissions control, the primary focus for emissions inspections often lies on the evaporative emissions system, as it directly deals with the management of fuel vapors which are a significant source of volatile organic compounds (VOCs). Proper functioning of this system is not only vital for passing an emissions test but also for adhering to environmental regulations intended to protect air quality.