There is an emissions test here in NJ. Many of our neighboring states are involved also. All model year 1996 & up vehicles are subject to this test.
Emissions Test Procedure
The test is called an OBDII test. All 1996 and newer vehicles are equipped with an on board engine computer or PCM (powertrain control module). The PCM performs self tests on the vehicle’s emission control & engine management systems during startup and vehicle operation. This testing can provide early warning for problems. While this self test is no guarantee against expensive repairs, it is required by federal law.