1998 caravan 3.0L 02 sensors

Discussion in 'General Motoring' started by geo.nova, Jun 27, 2008.

  1. geo.nova

    geo.nova Guest

    Check engine light came on , checked flash code is 21-oxygen sensor. I
    went in to pick one up and guys asks which one, upstream or
    downstream? He says I have to take my car somewhere to have them both
    tested. I would like to know how much I should expect to pay for the
    tests and installation. I know the part will be either $53 or $73.
    Also, does anyone know how much it can effect fuel efficiency and
    engine if I don't replace? Thanks in advance.
    K
     
    geo.nova, Jun 27, 2008
    #1
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