P1603 p1604 codes

Truck chugs and bogs down acts like it getting no.power.. dies and engine lights come on and from the scanner says p1603 p1604 are my codes... still every time flashes high transmission fluid temperature and low oil pressure as well... last Friday I did a drain and fill on the atf 3.3 quarts...

Need help understanding, dealership keeps nickel and diming me and this been the 5th this keeps happening.

 

I use this high tech shit called google, here's what i found.
" What Are Some Causes of a P1604 Code? Some of the more common causes for the P1604 code include a low battery charge, clogged fuel filter, or low-quality fuel within the vehicle. In some cases, the engine control module (ECM) may also be negatively impacted."
&
" OBD-II code P1603 indicates an issue with TCU communication. There are communications that exist between the engine control module, or ECM, and the transaxle control module, or TCM. This communication is done through a control area network, or CAN. "

And i don't get paid for this.

 

here are areas to focus on according to service manual. If the techs at the dealer cannot figure out, I down think we can. You need to provide some history and details. Freeze frame could be helpful.
FYI, these 2 codes only for AT tranny