see this is the problem with these needy transmissions, you will chase that problem all around until you spend $3000 fixing it. not worth it.
if it's shifting smoothly ignore the code for the TCC clutch.
it only gives a mileage increase on sustained highway speed trips, not in normal average daily driving.
I cut the wire for TCC on mine and my mileage stayed dead nuts the same.
so why go through all the expense and hassle trying to fix it
the old saying, you can't win for losing (money).