I've had to replace the plastic ends on both o2 sensors on passenger side. Wiring & the all 8 pins were fine so I put them back into the new plastic connections and I noticed that passenger side before cat. O2 sensor has two of the same color wires(white). On the other o2 sensor connection next to it has two same color wires (peach or pink) they kind of faded but I was able to match gray wires and the black wires on both o2 sensors. Does anyone know what the volt meter read out suppose to be on both o2 sensors on passenger side. Or any other way to tell that I got the pins put into the right order. The plastics got burned on exhaust manifold.