1998 ranger xlt o2sensor problem with check engine light on - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 05-27-2013
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1998 ranger xlt o2sensor problem with check engine light on

Ok just had my o2 sensor replaced by the passenger side and check engine light is still on??? I had it checked at auto zone and that's what the problem said it was ! I unplugged my battery to see if that resets it and it does for about 15 minutes and check engine light comes back on ?? And suggestions
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Old 05-27-2013
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What's the actual OBD-II trouble code it stores?
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Old 05-27-2013
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Originally Posted by logan03CO View Post
What's the actual OBD-II trouble code it stores?
Well it says bank 1 sensor 2 and I think the code is PO141 and at bottom it says
Possible cause
Faulty HO2S12. (Bank 1 sensor 2)
Poor connection at oxygen sensor
Check circuit-fuse
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Originally Posted by Mbafordranger View Post
Well it says bank 1 sensor 2 and I think the code is PO141
Did you replace the one after the cat? I believe that 'downstream' sensor is the correct one for a bank 1, sensor 2 code.

As far as I know, that's a pretty straight forward code.....
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Did you replace the one after the cat? I believe that 'downstream' sensor is the correct one for a bank 1, sensor 2 code.

As far as I know, that's a pretty straight forward code.....
I don't know alot about cars but the one He changed the one that's by the passengers front right tire is that the one ???
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I don't know alot about cars but the one He changed the one that's by the passengers front right tire is that the one ???
To me, that sounds like he may have replaced bank 1, sensor 1 (aka - the wrong one).
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Old 05-27-2013
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To me, that sounds like he may have replaced bank 1, sensor 1 (aka - the wrong one).
Are you sure so where is the right one located exactly remember I don't know about trucks engineor do u have a picture of location
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Are you sure so where is the right one located exactly remember I don't know about trucks engineor do u have a picture of location
If he was at the passenger wheel well, that sure sounds like he replaced sensor #1.

Bank 1 = Passenger Side
Sensor 1 = Up near the exhaust manifold (aka - upstream of the cat)
Sensor 2 = Just past the cat (aka - downstream of the cat)

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Old 05-27-2013
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Yeah I agree, sensor 2 should be post-cat. Normally they're numbered in order that exhaust flow would hit them.
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Old 05-28-2013
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Ok I found the problem the O2 sensor is gone ill try to post the pic what you see is just that and only that
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Originally Posted by Mbafordranger View Post
Ok I found the problem the O2 sensor is gone
Yep - That would trigger a trouble code alright. lol

Did you check to verify that it didn't just come unplugged? Or is the actual exhaust bung empty?
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Old 05-28-2013
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Yea it's empty the person that did the welding and rigged it up quickly and unprofessional didnt take time to put the rest on
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Yea it's empty the person that did the welding and rigged it up quickly and unprofessional didnt take time to put the rest on
Wow!

Well, hopefully that will clear it all up!
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Originally Posted by Mbafordranger View Post
Yea it's empty the person that did the welding and rigged it up quickly and unprofessional didnt take time to put the rest on
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