If a vehicle has an illuminated MIL for catalyst efficiency but passes all safety items, what is its status?

The correct interpretation in this scenario is that the vehicle will be rejected by the emissions test due to the illuminated Malfunction Indicator Light (MIL) indicating a problem with catalyst efficiency. Even if the vehicle passes all safety inspection items, the presence of a warning light suggests an underlying issue that affects emissions performance.

In many vehicle inspection programs, including New Hampshire's, an illuminated MIL associated with an emission control system failure means that the vehicle does not meet emissions standards. Consequently, it cannot pass the emissions inspection, leading to its rejection in that category. This highlights the importance of ensuring that both safety and emissions components are functioning properly for a vehicle to be considered roadworthy and compliant with state regulations.