Oil Pump problems of the 2012 Dodge Grand Caravan

I was driving van trying to merge onto highway with my family when check engine came on and van just went limp as I merged we almost got hit from behind thankfully we didn�t! this is a known problem with Chrysler and Dodge 3. 6 engines I recently purchased a used 2012 Dodge caravan rt I should have done research on it, also I tried to get emissions to pass inspection and I failed, there is this p06dd code that is affecting the van, I brand van to mechanic and over a week later new oil pump new oil filter housing adapter and over 1k in parts and labor and the problem still exist pertaining to that p06dd check engine code! that code puts engine in limp mode or safe mode, it make van very slow with out any power which is very dangerous trying to get onto highways when you van will not accelerate because of code! mechanic tried everything even with help from a Chrysler technician, andy they can't get rid of that code p06dd like I said oil pump replaced oil filter housing replaced oil pressure switched replaced wires harness computer reflashed, I did research and I see plenty of Dodge Jeep and Chrysler with 3. 6 has this issue even vehicles that come out of the dealership brand new has this issue! in my case I'm 7grand into this used vehicle and I can't even register it because of this issue! I can't even sell it trade vehicle because I can't get it passed inspection nor drive the vehicle because it's just flat out dangerous, I don't wanna invest in new engine because I heard of nightmares where Dodge replaced engine and even with new engine this code p06dd check engine light still exist? please help I have a family of 5 I can't afford of just loosing 7k I paid 5500 for van and about 1500 in repairs so far and van is still not working please can anyone help with this and investigate? thanks jason.