so my cars still in limp mode,the only code I get is p0332 (knock sensor 2 input to low)does this mean I need a new knock sensor?Also lately when I hit about 4800-5000rpm my turbo makes a loud grinding noise,but it only does it about 50% of the time.Any suggestions on what this could be?

thanks

 

I also notice that if i rev out the car while its in limp mode,it comes out of limp mode for a while, but then goes back in.

 

Sounds like your turbo is on its way out.

 

does your turbo sound like a dentist drill? how much boost are yoo making? does it feel like you have no power in the high rpm's? if so your turbo may be done

 

yeahh it sounds like a drill real bad,but it only does it at higher rpms,and im not sure about how much boost im making because im always in limp mode because of the knock sensor