Vehicles manufactured in 1996 or after must undergo which tests?

Vehicles manufactured in 1996 or later are required to undergo specific tests to ensure they meet safety and environmental regulations. The correct answer involves the gas cap pressure test and the On-Board Diagnostics (OBD) test.

The OBD test is crucial because it checks the vehicle's emission control system, allowing diagnostic information to be retrieved from the vehicle's computer regarding performance and potential issues influencing emissions. A properly functioning OBD system can help identify problems before they lead to excessive emissions and ensure compliance with environmental standards.

The gas cap pressure test is important because it evaluates the integrity of the fuel system. A defective or improperly sealed gas cap can cause fuel vapors to escape into the atmosphere, contributing to air pollution and violating emissions regulations.

Together, these tests are significant in Maine's vehicle inspection program, as they help maintain air quality and ensure vehicles remain safe and operational from both safety and environmental standpoints.