Questions about Hybrid Vehicle Emissions Testing

Why do I have to test my hybrid-electric vehicle?

While it is true that a hybrid-electric vehicle emits less emissions overall than a similar sized gasoline-only powered vehicle when operating as designed, the potential for high emissions is still present. Hybrid-electric vehicles are equipped with all the standard emissions control devices as any other vehicle. If any of these emission control devices should deteriorate or fail during the life of the vehicle, the emissions could potentially exceed allowable limits during gasoline operating periods. The vehicle emissions test is designed to identify these potential emission control device problems before any significant emissions increases occur.