can't find my after cat O2 sensor E350 van
I have a 1998 ford e350 5.4L extended van with 140,000 miles. The check engine light is on and it just failed emmisions test, I am guessing that the O2 sensors are bad. I figure with that much milage I should change them anyways. I replaced the 2 before the cat ( thats closest to the engine ) with Bosh#15716 . But I can't find the O2 sensor after the cat. The service manual shows one sensor just after the cat before the muffler on the top of the pipe , but it's not there, no wire either.
I read some place that some models don't test the emissions after the cat but that's not what my service manual shows.
Does anyone have any more info on this ?
Thanks for your help !
Last edited by syncmaster; 01-27-2004 at 07:58 AM.