Lawrence

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