Here's one old post to get you thinking, others are available with search > o2 sensor > problems > subject. A search on the code itself may also get some hits. http://www.contour.org/cgi-ubb/ultimatebb.cgi?ubb=get_topic&f=3&t=004633&p=
98 Mystique LS v6 atx 110,000km
97 Contour LX v6 atx 125,000km
stock CD on LS, cass on LX
spoiler, tinted windows on LS only
4 wheel discs on LX only
All other available options on both
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