Any hose, wire, belt, or component required for the operation of the emission control system which is present but has been disconnected.

• A. Disconnected
• B. Tampered
• C. Not Applicable
• D. Missing

Answer: (A)

When evaluating the emission control system, if a required hose, wire, belt, or component is present but not connected, it is classified as disconnected. The key idea is that the part is still there, but its connection to the system has been severed, so the control system can’t operate as designed. This distinction matters because the system’s integrity is about both presence and proper linkage; a disconnected part breaks that link and leads to malfunction or higher emissions.

This differs from tampered, which implies deliberate modification to defeat the system rather than simply being disconnected. It’s also not missing, since the component exists, and it’s not not applicable, since the vehicle does rely on that component. For example, a vacuum line left unplugged or a sensor wire left disconnected means the emission controls aren’t functioning properly, hence the correct label is disconnected.