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2000 Lincoln nav. check engine light comes on. Put on computer, reading 6 differ on 2000 Lincoln Navigator

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2000 lincoln nav. check engine light is on. Computer is reading 6 different codes pertaining to o2 sensors, bank 1 and 2, fuel too rich,
(1) Answer
so...six codes saying it is rich means...it is running rich, so check for possible leaky injector, maf, or cts...