2005 Ram 2500 Auto 4x4 stuck in 3rd after trans rebuild

[Brookes Milbourn]

Hello, new here but we just got our truck back from the trans shop that I have dealt with here locally several times now. I do not doubt their abilities or craftmanship as they have done multiple gm units for me as well and I know they are fairly well versed in the 48re as well. Long story short after they completed the rebuild and installation the truck now seems to be stuck in ( im assuming 3rd gear ) Codes I am seeing on my scanner are P0869 Trans fluid pressure high and P2607 intake air heater B circuit low. The shop seems to think that my pcm has gone bad and is not sending the PWM ground signal to the governor pressure solenoid. I do have a tech coming to the shop this weekend with a much better diagnostic scanner than I have to hopefully do some more in depth testing but I was hoping someone may have some pointers as far as failure points we may be able to take a look at. So far things I have done are installed new soldered on battery cable lugs to all cables including crossover cable. removed the ground bunch over on the driver firewall to inspect for corrosion and clean connection. I also verified with the rebuilder that the pressure solenoid and transducer were both replaced as well. Thank you in advance to anyone that could offer any help.