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Connecticut Emissions Program
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General Testing Info | Test Procedures

 

Test Procedures

Easy and Efficient Tests

For vehicles model year 1996 or newer, Certified Testing Inspectors will plug a scan tool into the vehicle's On-Board Diagnostic (OBD) computer system to download data and determine if emissions components are properly functioning.

Emissions from vehicles that are 1995 and older will be measured by inserting a sensor-probe in the tailpipe. Some vehicles will be driven on a dynamometer, a treadmill-type simulator of real-world driving conditions.

 

  


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