I'd say replace it! I'm surprised it lasted that long. The O2 sensor
went out on my 97 at about 60k. They're no that tough to replace, so
if you get the engine light and the O2 warning you can change it out
a lot easier than those damn spark plugs, but if your going to be
working on the truck anyway, I'd say do it.
-- Tony J Mastres Senior Photographer University of California @ Santa Barbara Instructional Resources/Photo Services 1120 Kerr Hall Santa Barbara Ca 93106 UPTE local 9119
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