odb II code p1416

I received a service engine soon light and have an odb II code
reader and got a p1416 code(air system bank 2). How can I
narrow this down to a specific part. The car has 71,000 miles.
This also happened at 35,000. The dealership said it was an air
injection check valve on bank 2. Both were replaced at that time.
Any help would be appriciated. Thanks
M.J. Charbonneau

check the fuse, um..... crap dont remember the name of it, its probly just AIR fuse, i remember helping someone with the same code and problem, and thats what it turned out to be.