Traveling about 75MPH yesterday (legal!) and Restricted Performance showed up for about 10 minutes. Went away but left the Check Engine (MIL) light on.

Still on today so got the freeze frame codes and saw both banks were running lean (thank you AutoZone for the OBD2 loan).

Visual inspection of the engine compartment, focusing on the air system and noticed the Full Load Breather Hose has a busted connector at the air intake tube end and was only partially inserted into the tube. Do y'all think this could be the cause of the banks running lean?

I've ordered a new hose and Gorilla-taped up the busted end for now.

 

That sounds like a very likely culprit. Clear the codes and see if it comes back now that it is sealed.

 

That's the problem. Easy fix.