hey i need help i got 2 codes
its codes 20 and 23
i dont know how to get rid of 20
and im not sure where the knock sensor is located on a b16a2 block i have a wire thats not plugged in and i might think that is the problem

thanks

 

Knock sensor is located on the back of the block under the 2nd intake manifold runner. Very top of the block, above the oil filter, right underneth the head/intake manifold.