Welcome to the Connecticut Emissions Program

Your vehicle will be visually inspected for the presence of the catalytic converter, which was originally installed by the vehicle’s manufacturer.  The catalytic converter is a post-combustion control device that converts toxic exhaust emissions from your vehicle’s engine into non-toxic substance.  It must be fully intact for your vehicle to be considered for an emissions test.

Removal of or tampering with a catalytic converter is a federal offense.  If your vehicle is missing a catalytic converter, it will fail the emissions test.