can't find my after cat O2 sensor E350 van
Thread Starter
|
Senior Member
Joined: Dec 2002
Posts: 104
Likes: 0
From: NY
Throttle,
I think your right , I'm gonna have to go to the stealership soon.
I think I'll try what WMCNALLY suggested , maybe I do have a leaking intake gasket it's easy enough to check.
I'll report back when I find the problem
Thanks for the input
I think your right , I'm gonna have to go to the stealership soon.
I think I'll try what WMCNALLY suggested , maybe I do have a leaking intake gasket it's easy enough to check.
I'll report back when I find the problem
Thanks for the input
Junior Member
Joined: Nov 2022
Posts: 1
Likes: 0
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 !
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 !
Senior Member
Joined: Dec 2006
Posts: 43,542
Likes: 819
From: Joplin MO
Syncmaster hasn't logged in for over 6 years.
Some 1998 E350's do not have a rear sensor, just the 2 front sensors. I believe it depends on the vehicle GVWR, over 8500# has a different emission system and doesn't require post-cat sensors.
Some 1998 E350's do not have a rear sensor, just the 2 front sensors. I believe it depends on the vehicle GVWR, over 8500# has a different emission system and doesn't require post-cat sensors.
Senior Member
Joined: Oct 2002
Posts: 7,295
Likes: 125
From: St. Louis (Out in the woods)
I believe it depends on the vehicle GVWR, over 8500# has a different emission system and doesn't require post-cat sensors.
Vehicles > 8500 GVWR AND with "Federal" emissions did not have downstream O2 sensors as they were calibrated to only OBD1 standards. Vehicles > 8500 with "California" or "OBDII" emissions had downstream O2 sensors (and more).