Hi,I have bought a O2 sensor from mitsu dealer for 91 awd,but the plugs are different and can not be connected to each other.so i had to cut the plug from my old o2 sensor amd connect wires from new o2 to it.had the check engine light on so i reconnect the wires and light was gonne.but today the light came back.what shoul i do know.
thanx for all ur help in advance.