What emissions test is performed on light-duty trucks and vans?

Light-duty trucks and vans are subject to emissions testing protocols that are aligned with those applied to passenger vehicles. This means that both categories focus on evaluating tailpipe emissions and the functionality of the On-Board Diagnostics (OBD) system.

The purpose of this approach is to ensure that these vehicles meet the same environmental standards that are set for passenger vehicles, as they can contribute similarly to air pollution and greenhouse gas emissions. Emissions testing typically involves analyzing exhaust gases to measure levels of harmful pollutants such as carbon monoxide, nitrogen oxides, and hydrocarbons. The OBD functionality check ensures that any onboard monitoring systems designed to detect malfunctions in the emissions system are working correctly.

The other options suggest different testing criteria or procedures, such as focusing solely on weight, conducting only visual inspections, or applying more stringent tests, which do not match the established protocol for light-duty trucks and vans.