Needing some help here

Hey all, I'm running a 2006 Pete 379 with Cat C15 acert engine. Over the last several months I've been plagued with problems regarding the engine and check engine codes. Most notable has been code 72, injector one low voltage. Both internal wiring harnesses have been changed, number 1 injector has been changed, and most recently a new ECM yesterday. The codes have been coming about 2-3 weeks apart. Truck has nearly 1.4 million miles however the engine has approx 215k since having a Platinum rebuild done in August of 2016 at Cleveland Brothers CAT in Harborcreek PA. Has anyone else had similar issues? I cant help but think it's the tablet for my ELD or one of the apps associated with it. Other drivers in the same company have had similar issues. Is it just coincidence or could there be more to it? Any response is appreciated

 

I should also add that not only the internal harnesses have been changed but also the main harness off the ECM is also new

 

ECM was replaced as the next in line of possible causes to the recurring engine code. Trouble started about 2 months ago, maybe a bit more. A solid year and a half and 200k miles since the rebuild took place