So I just picked up a 2000 Si (B16A2) and it is showing a CEL for a knock sensor. Upon looking around a bit, I found that not only do I not have a knock sensor installed currently, but the lead coming from the harness is cut (no connector). My question is, how would I go about rewiring the knock sensor? I already picked up another from a junkyard, but I have nothing to plug the sensor into, as the other connector is gone.

 

You should be able to get another connector from the junkyard and just solder that to the knock wire in your car.