Welcome to the Connecticut Emissions Program

The Pre-Condition Two-Speed Idle (PCTSI) Test is designed for 2007 and older non-diesel vehicles with the GVWR of 8,501 LBS to 10,000 LBS.

The Pre-Condition Two-Speed Idle (PC TSI) measures tailpipe emissions (hydrocarbons/carbon monoxide) at cruise engine speed and then at an idle speed. In addition to this test, your vehicle is also subject to the Gas Cap Pressure Leak Test.

In addition to this test, all vehicles are subject to the visual verification of the catalytic converter; if one or more catalytic converters are missing from your vehicle, the emissions test will fail.