What should inspectors focus on during the second check of the engine and tailpipe?

During the second check of the engine and tailpipe, inspectors should focus on emissions performance. This stage is critical because it provides a direct assessment of how well the vehicle is controlling harmful pollutants. Inspectors evaluate whether the emissions meet regulatory standards set by environmental authorities.

This assessment typically involves measuring exhaust gases to determine the concentration of various pollutants, such as hydrocarbons, carbon monoxide, and nitrogen oxides. A vehicle that fails to meet these emissions standards may indicate issues such as a malfunctioning catalytic converter or problems with the engine management system, both of which directly impact air quality.

While oil levels, brake response, and transmission fluid are important aspects of vehicle maintenance, they do not specifically address the emissions performance of the vehicle. Proper emissions performance ensures that the vehicle operates within the environmental regulations, making it a priority for the inspection process.