rocker tick

My son's 2012 Pentastar 3.6 is throwing P0016 code and misfiring. I don’t know how to diagnose it. We just changed rocker arms on driver’s side (bank 2 I believe) to fix a tick, and it immediately coded. Supposedly P0016 = bank 1 cam A is out of sync with crank, and I believe bank 1 is the...