whats this computer code?

hey guys, i needed to get my car inspected (NEW YORK) and a code came up b/c the check engine light is on. they never seen this code b4 and have no idea what it is. they told me to take it to ford but im pretty sure someone here will know what it is. the code comes up - P0411 seconary air injection malfuction (incorrect flow). its not the o2s. could it be something to do with the fuel injectors? i hear a ticking sounds like the injectors or a exhaust manifold leak, its been there forever. its the common ford sound that you hear on them all, mainly on the older trucks, anyways, if you can help me out, that be great. thanks. 2000 v6 3.8l