Check Engine - Code 28

Discussion in '80-Series Tech' started by lovetoski, Sep 22, 2003.

  1. lovetoski

    lovetoski SILVER Star

    Messages:
    4,548
    Likes Received:
    220
    Joined:
    Jul 13, 2003
    Today the check engine light went on, I retreived the diagnostic code per my Haynes manual, and it's #28. Per Haynes this is the Post Catalytic converter, a diagnosis of "open or shorted circuit in the post catalytic converter oxygen sensor circuit." OK, I think I kinda understand....I read a bit further, specifically re testing the oxygen sensor...I think I could do all this...
    But I wonder, does the code just mean I should replace the second sensor?
    BTW, I reset the codes, ran the cruiser again, and no check engine light comes on. Could it be a fluke?

    Any and all help is welcome!
     
  2. Beowulf

    Beowulf

    Messages:
    12,529
    Likes Received:
    55
    Joined:
    Mar 27, 2003
    Location:
    Somewhere in the foothills...
  3. lovetoski

    lovetoski SILVER Star

    Messages:
    4,548
    Likes Received:
    220
    Joined:
    Jul 13, 2003
    Thanks Beowolf...you'd think w/a college degree I could read...
     
  4. sleeoffroad

    sleeoffroad Supporting Vendor

    Messages:
    6,156
    Likes Received:
    1,081
    Joined:
    Mar 27, 2003
    Not sure on that one. You don't have a post catalytic O2 Sensor on a 94 :eek: Be carfeull what the Haynes manual recommends.
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.