Check Engine - Code 28 (1 Viewer)

[lovetoski]

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!

 

[Beowulf]

Doug,
Just a few posts down the list and you can find some great advice.
http://69.61.14.149/forum/index.php?board=2;action=display;threadid=5483
-B-

 

[lovetoski]

Thanks Beowolf...you'd think w/a college degree I could read...

 

[sleeoffroad]

Not sure on that one. You don't have a post catalytic O2 Sensor on a 94 Be carfeull what the Haynes manual recommends.