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Joined: Nov 2002
Posts: 851
Veteran CEG\'er
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Veteran CEG\'er
Joined: Nov 2002
Posts: 851 |
Originally posted by April Thompson:
BTW: Can an O2 sensor go bad for years before the PCM tumbles on to it?
Yes. The O2 sensor degrades in a linear, analog manner, slowly getting worse as time goes on.
The PCM, however, considers the O2 sensor to be in either one of two states: "good" or "bad"--which it isn't.
It's like shades of grey vs. black and white.
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