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In YM 1994 they came with one or two O2 sensors. The critical one is in front of the cat. The one on the rear, if equipped, only reads as a check of the cat performance and generally never fails. If you don't see one right after the cat, you don't have but one on the truck.
Yep I got a 1996 and i got 2 before and 1 after the cats... i plan on changing exhauast here soon will that cause problems? i want true duals..
I have the same question, if i'm gonna make a true dual system on my truck what are some ways to make sure the O2 sensors will still do their job. anyone with a true dual set up that has had to work around this problem?