Jeremiah D. Bullfrog

I recently had my battery light come on, voltage started dropping, and i changed the alt and the battery. The voltage would still drop below 11 and my cam sensor starting throwing a code and the truck would miss pretty badly. (i've changed the sensor and synchronizer a year ago. magnet broke). had the new altenator tested, IT was bad. put a new one in, it seemed to run fine and the voltage was about 14.86. a few miles down the road the engine light comes on and i may have felt a slight hickup. code reads Battery Pack Voltage Out Of Range and cam position sensor. I erased the codes and they keep coming back. it seems they both appear when i rev the engine slightly. any help with it is much appreciated