Well, as the title suggests, I am curioues to know if there is a way to test whether or not the O2 Sensor needs replacement or not. I have '98 XJ and as far as I know everything seems to be running fine. I just replaced my cat two days ago with a hi-flo and I figured I might as well ask how others were able to diagnose a faulty O2 Sensor. Are there particular symptoms I should look for? Thanks!!
Joey B
Joey B