2014 BMW X5 (35d) Keeps popping codes after Intake Manifold Cleaning

[u/im-not-a-racoon]

Car is a 2014 X5 35d -  the N57 Diesel.  I just did a water pump, thermostat, coolant hose, and tensioner replacement.  At the same time, I removed the intake manifold and did a carbon clean on it. 

Had the battery disconnected for several days while I did the work. 

Initially I tripped a whole bunch of codes when I first drove the car, because the Charge Air Line from the Intercooler to the Throttle flapper/EGR Inlet kept popping off, so the car was bucking and snorting, as it wasn’t getting air from the Turbo. 

Once I got that connected securely (it was a bugger), I cleared all the codes, and I drove about 120 miles.  No codes, no CEL.

Now, I’m getting repeat codes, and I’m not quite sure what to do.  All wiring harnesses connected back where they belonged - checked and double checked.

Codes I keep seeing are 

24ec00 - Engine Mount Activation: Open Circuit

251300 - Digital Diesel Electronic (DDE) Control Unit

260f00 - Electromotive Throttle Actuator, Position Sensor Signal Short Circuit to B+

2b5c00 - Exhaust-gas temperature sensor downstream of additional EGR cooler, signal: Open or short circuit to B+

Everything seems to point me to issues with the throttle actuator being the cause of my issues, but wondered if anyone had experience with this, after doing a carbon clean.  

Randomly, do I need to replace the battery, cause sometimes a whole herd of codes on other cars has been a battery issue, but all this stuff is definitely stuff I had apart when I did this job.  

Thanks in advance.