location of heated oxygen sensors on toyota pickup 4×4 6cyl?

I need to replace heated oxygen sensors on my 1994 Toyota truck. I found the one right before the cat. converter, however I am unable to find the other one. I need to replace them so I can pass smog test. I need to try to do this myself.

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One Response to location of heated oxygen sensors on toyota pickup 4×4 6cyl?

  1. Johnny Rotten October 12, 2010 at 12:40 pm #

    There are 2…The other is after the cat….The heated one is the one before the cat…