Ok I need a question answered and quick... I have a CX hatch with a Y8 in it. Now the only code im getting is the 41 (Primary Oxygen Sensor - Heater circuit malfunction). I went on rewire. com and bought the CX VTEC and o2 sensor harness bc the CX has 1 wire o2 and i need 4 wires o2 to run on the p28. Now I have a 4 wire o2 that is OBD2 will it work or would I need to get a 4 wire OBD1 o2? They look the same, but I was told they have diff part numbers? Anyways today I installed the rewire harness and still got the code 41 still. So, I cheked not once nor twice 4 times and all was well done. Now could it be my o2 or what?