Codes P0856, P2544, P150C and U0073, no communication with control modules?

The method to check the modules is difficult but it sounds like the TCM has gone out, but I would start by having the system on and checking all fuses. This guide can help and I have included the fuses location as well in the images below. Under the hood and on the left and right sides of the dash.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

P0856: This code is related to the Traction Control Input Signal. P0856: This code is related to the Traction Control Input Signal.

P2544: This code represents "Torque Management Request Input Signal 'A'." It is generally associated with the transmission control module.

P150C: This code is less common and might vary by vehicle and manufacturer. However, in many cases, it relates to the vehicle's speed control or throttle system.

U0073: This is a network communication code indicating that there is a problem with the communication among the vehicle's Control Module Communication Bus "A" Off.

Here is how to test the TCM if you want to give it a try, if not you can send the TCM for testing. Here is the location of the TCM as well. Check out the images (below). Please upload pictures or videos in your response of the problem so we can see what's going on.

Is this a 8 speed or 6 speed transmission? Ths 6 speed module is located inside the transmission. Here is how to change the module for the 6 speed unit with the adaptation reset as well. Check out the images (below). Please let us know what happens.

Yep, the TCM is part of the CAN and if not working it will cause a communication code. Sure, here is the TCM connector view and identifications and positions. Check out the images (below). Please let us know what happens.