Weak engine break and fan clutch on

Engine brake is very very weak..and fan clutch is on all the time..
2013 detroit dd13..( #### short nose)
Mileage 720000
Fault codes
Spn 171 fail05
Ecu1 spn 641 fail04
Ecu 1 spn 641 fail05

I changed the solenoid already..nothing..still same..I am starting up the engine every morning and making air ,and after that I gotto shut it off. Gotto wait …and then I am turning the ignition on , waiting like 10 seconds again and I am checking if the fan is free.after 2 or 3 attempts the fan clutch is ok...This is what I am doing everyday..its killing me..
I changed clutch sensor too..
I have 3 fault codes..
Its about turbo actuator..I changed that one too..still same codes.

.the truck is running fine..hauling 80k everyday..climbing hills no problem.no power loss..turbo is not overheating.
.
I ve been driving like this for the last 5 months..there is no mechanic to fix it in entire new york !!! And when u go freightliner dealer they make an appointment after 3 weeks.. I am desperate..
Fan clutch , engine brake and turbo actuator, they all popped up same time…after a heavy rain.I dump my load off , I was heading home and all of a sudden fault codes showed up..
Fault codes
Spn 171 fail05
Ecu1 spn 641 fail04
Ecu 1 spn 641 fail05
Any idea ? Is this electrical ? Or ecm mcm ? Or valve adjustment We did before Before all these things happened ?
Anyone has the same problem ?
When I google the spn 641 fault code , it says open short circuit .. no solution yet ..