Welcome to the Connecticut Emissions Program

The Gas Cap Pressure Leak Test is required on vehicles that receive the Pre-Condition Two-Speed Idle (PC TSI) test. This test ensures the gas cap(s) on your vehicle are capable of properly sealing the gas tank which allows the vehicles evaporative emission system to properly dispose of fuel vapors.

Note, if your vehicle requires the Pre-Condition Two-Speed Idle (PC TSI) test and the gas cap(s) are missing from your vehicle, it will be rejected from emissions testing.

Malfunctioning gas caps will cause your vehicle to fail the emissions test.