knock sensor throwing codes p0327

[electricalserv x5]

Hi guys anyone have experience with this code for the knock sensor?
On my n62 it stated about a week ago , it set the SES light , I had the code knock sensor bank 1 , I cleaned it then today I was driving around a bit, stop to pick up some stuff went to start her up and heard a mis-fire then the code [engine fail safe program] I drove a little bit turn the engine off , got out my code reader, seen the DTC knock sensor [bank 1 ] low voltage , also cam sensor .
Any help would be appreciated , I am not going to drive her until I find out what's going on .