I've seen the thread on here about at what mileage to replace the O2 sensor so I am not asking the same question here. I was just curious if there is a way to see if the sensor is starting to degrade or do they just do the "work" or "not work" type of job? If I hook up my OBDII interface on my laptop and monitor readings from the sensor will those readings tell me much about how well the sensor is working? Anyway, like I said, I was just curious.
Cheers, Lawrence