What type of check is performed on vehicles from 1996 and newer?

Vehicles from 1996 and newer are equipped with onboard diagnostic systems (OBD) that monitor the performance of the vehicle’s emissions controls. The OBD system provides real-time information about the engine performance and emissions-related components. During the emissions inspection process, a check of the OBD system is performed to ensure that it is functioning correctly and to identify any fault codes that may indicate issues with the emissions control system.

Additionally, a gas cap check is also conducted, as a proper seal on the gas cap is crucial to prevent fuel vapors from escaping, which contributes to air pollution. This combination of OBD and gas cap checks is vital for determining whether the vehicle meets emissions standards, making it the correct approach for evaluating newer vehicles that utilize advanced emission control technologies.