1997 Plymouth Voyager fuel system status 1 and 2

I'll explain and then ask a question, if I may. Fuel system status is part of the computers programming for making the car run efficiently. It commonly refers to "closed loop" or "open loop." When the engine is cold, fuel system status should be in "open loop" meaning it will only monitor a few crucial sensors unit the vehicle warms up. Then it enters "closed loop" and begins to monitor all sensor inputs to determine the best way to maintain the engines efficiency. Typically, they will move simultaniously. Now my question: Why did you ask about the fuel system status? Have you had the vehicle scanned to read this code or in conversation with someone did this come up? I may be able to help, but I need a little more info. Thanks for your patience.
Dave