Date: Wed, 31 Jan 2007 16:50:56 -0500
From: Fred W <>
Subject: Re: 1996 900S Catalytic converter

Skywalker wrote: > On Sun, 28 Jan 2007 18:10:21 +0000, - Bob - wrote: > > >>On Sat, 27 Jan 2007 17:10:14 -0500, "Newsman" <> >>wrote: >> >> >>>My 1996 900S 2.3 (non turbo) did not pass the emission test due to a bad >>>catalytic converter, in addition, one of the oxygen sensors is bad, too, I >>>think. >>> >>>Has anyone had this problem in this car? Will a replacement of the >>>catalytic converter with a universal catalytic converter solve my problem? >>>The factory replacement is too expansive. I live in the U.S. >>> >> >>It's not unheard of. Cat's usually get killed by too much raw gas >>being dumped into them. That can happen because the O2 sensor went >>bad. The O2 sensors on these do wear out eventually. > > > > There are two oxygen sensors on these 96 900S's: before entering the > converter and after. Should the one entering be the bad one? Thx Yes. The O2 sensor after the cat is only used to tell the OBD2 that the cat is working correctly. The one before the cat is used to provide feedback to the ECU on mixture richness. If the front one is bad it can result in a rich micture which will eventually kill the cat. If the sensor goes far enough out of whack it will cause the ECU to throw a check engine code of "mixture out of range" or something similar. -- -Fred W

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