Freightliner shuts off while driving

Hope everyone is doing well. I’m running into a big issue with my 2012 Freightliner Cascadia dd15.. about 3 weeks ago I was down the highway and the truck randomly lost electric power. My check engine lights came on and then would go off but my maintenance light stayed on. I lost throttle response and after 10 seconds gauge cluster would reset and power back on. Weird thing is my engine would never shut off, just Idle, and no throttle response and cluster will lose power as if I turned off the ignition and turned it back on. Drove like this to a Freightliner in NC then they said the ECM was not getting good communication. They replaced my wire Harnesses and my pnrd. Drove the truck out after 2 weeks. As soon as I went over 70 mph, truck did the same thing. Took it back they checked wiring and found 2 lose connections, they fixed it, then I went omw to FL about 300 miles into the trip truck started to do the same thing I ended up making it to FL. I realized right before the fan would kick on to cool off the truck it would lose throttle response and gauge cluster do a reset and check engine light will come on as soon as the fan went off like if it was draining too much power when the fans were on. Took it to my local Freightliner they checked all wiring they said they all look good. They said there is no communication between the ECM and the CPC. Now they are changing the CPC. Has anyone had this problem or know what can cause this? Could it be a bad CPC or bad ECM? Thank you, I hope someone can help. Also I got like 15 codes but they are all EEC61 codes meaning after treatment but they said all those codes are coming on because ACM keeps shutting off.

 

Yes Freightliner checked all. It’s at a different Freightliner now and they rechecked all wiring and all looks good

 

I changed the PNDB when they did they wire harness and still dose the same

 

My engine always stays on never goes out what goes out is the electric.. and that causes me to lose throttle Response

 

It’s alright thank you!