P0022 code, now I need a new engine

My truck started hesitating then would shut off at stop signs and lights. I bought an ODB II code reader and got code p0022. Did the research and replaced both vct solenoids. The check engine stayed on so I reset it and the truck ran fine for 18 or so miles and check engine came on and it started up all over again. Did some more research and learned that it could be the oil pump or the cam phasers. Took it to my mechanic and he basically gave up saying to many things could be wrong with it and he was swamped with work. He suggested I take it to the dealer. During my research I noticed that by taking the truck to the dealer would result in being told that I needed a new engine. Took it to the dealer which ran their own diagnostic which resulted in the same code I knew the truck had. Then the oil pressure test was good, I as told. Before all this they wanted to take the vct solenoids out to check for metal. But since I had replaced both of them and didn't notice any metal on the vct's they didn't remove them. Then I received a call telling me that the camshaft looked scored and had large scrapes. This according to the dealership caused a lost in pressure and could be causing the problem. I knew taking it to the dealer would result in a engine rebuild or an engine swap. This seemed to be the theme as I read thru the threads. My question is does the camshaft having scrapes enough to cause code p0022 and the symptoms my truck is suffering from?