I have a 2002 Monte Carlo LS 3.4L I have a P1189 code regarding my engine oil pressure circuit and I am trying to change my engine oil pressure circuit but have no idea where it is located, can someone please help me or point me in the right direction as to where it is located. Thanks, I appreciate it.

 

Should be to the right of the oil filter (closer to the drivers side), above the starter. Its not the knock sensor (1 wire, larger diameter sensor body), but the other sensor in that area.

 

I'm almost positive its the sensor with the red line going to it.