Emissions/On-Board Diagnostics (OBD)
In addition to a physical safety inspection required for all vehicles, pursuant to RSA 266:59-b IV, vehicles less than 20 years old must have an On-Board Diagnostics (OBD) test as part of the inspection process. On-Board Diagnostics is a computer-based system built into all 1996 and newer light-duty passenger vehicles to monitor the performance of some of the engine's major components, including emission control components. The OBD system helps the motorist know if their vehicle has a defect that could cause excess pollution. In addition, it helps mechanics accurately diagnose problems and make effective vehicle repairs
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