Check engine light on

I got 2016 Peterbilt 579 , Cummins X15 (03/2015) and my engine light is on. My mechanic checked with Cummins insite and told me it is injector 5 and 6 so they replaced injectors 5 and 6 ,they put a new injector harness , rebuild fuel pump and they put new fuel pressure relief valve . I was driving maybe 80miles and check engine light is on again? Same thing injector 5 and 6 on Cummins insite. Truck is running good empty or loaded . Anyone knows what is the issue? Thanks

 

My ESN 79861398, I don't remember codes ,my mechanic told me it is 5th and 6th injector. I will try to get codes over the weekend or next week.

 

My ESN 79861398 and this time code is 1144 on Cummins Insite . Mechanic did injector test via Cummins Insite and all injectors passed . I don't know what to do next .Truck is running good,loaded or empty ,no issues but check engine light is on.

 

I got temporary new ECM and after 50miles check engine light is back on with same code 1144.
I don't know what else can be wrong , maybe engine harness?

 

I got new engine harness and I replaced one exhaust gas pressure sensor and check engine is on again after 70miles . Error code 1144 again . Maybe there's more sensors that need to be replaced?