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Old 06-13-2007, 10:35 PM
saumil saumil is offline
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Join Date: Aug 2001
Location: Houston, Texas
Posts: 393
The O2 light came on with all other lights and went off normally, so there was no reason to believe that it was mal-functioning. Maybe a CAT would last longer if O2 sensor is replaced routinely, but it is unlikely in my case, because the car was burning lot of oil, so at some point the CAT was going to clog. The O2 sensor and even the clogging CAT as far as I can tell were doing their job just fine because the mixture was producing emissions well within the range. It is also possible that the O2 sensor on my car was an exception rather than the rule.
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