05 S-type intermittent starting problem

I have an 05 s-type automatic with the v6.

My car has an intermittent starting issue that I can't figure out and would appreciate some ideas. When I try to start the car the following happens:
The engine doesn't attempt to crank, it displays engine fault light, the red and yellow fault light, transmission fault, park brake fault, abs fault, and DSC unavailable. When this fault is occurring I cant connect with the OBD reader, the brakes stiffen up and I can't change gears with the key in the ACC position. Once the car does start, it seems to run fine with the exception of the faults. Once it starts once it will continue to start for a period of time. After turning the car off and restarting it, all the faults and warnings go away. Sometimes if i hold the key in the start position the car will start just start up after a few seconds, but most of the time it doesn't. I usually just have to wait a few minutes or a few days and then all of a sudden the car works again.

I was able to pull the obd code P1797 CAN TCM/ECM Circuit Malfunction
out of it one time when it did allow me to connect.

I would appreciate any input you guys have and please just let me know if I need to include any more information.