P0136 AHHHHHHHHHHH!!!! - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 07-15-2009
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P0136 AHHHHHHHHHHH!!!!

You guessed it CEL. Im being told Bank 1 sensor 2 nobody can tell me with one it is. The best answer i got two weeks ago was front drivers side. So i replaced it and the lights back on again after 2 weeks. Today a different guy at the shop told me it was passenger rear. WTF I saw the glossary of codes Fx4wannabe had and it helped but i don't get all of it. Witch sensor is it? And why would the light go off for 2 weeks then come back on if it was the wrong sensor? Some body help!
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Old 07-15-2009
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knowbody knows?
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Old 07-15-2009
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bump?
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Old 07-15-2009
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Cant explain why the CEL went off then came back on

My manual says P0136 is the downstream Oxygen Sensor bank 1
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Old 07-15-2009
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so would that be the back one theres only three if im correct. Two on each down pipe and one behind the last cat?
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Old 07-15-2009
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Ya downstream one will be the last one after the catalytic converter

I think there is just 2 not 3
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Old 07-15-2009
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since its intermittent what are the chances i could clean it out or check the wiring and plug? Never mind ill just go try!
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Old 07-15-2009
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no, there are 3
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Old 07-15-2009
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My understanding is bank 1 (drivers side) sensor 2 second sensor downstream.

Now as far as the light going out, and then coming back on 2 weeks later, i dunno why 2 weeks. Likely would have gone out in the first place because something changed, so it reset, and then realized, Crap same thing is still happening. But usually after a driving cycle the light should come back on (if it is going to)

Now this is USUALLY. We have had countless times here where we have driven a customers vehicle all over, we have had a tech drive the vehicle home, on and on and on, and no light comes back. So we release to the customer, they phone us about 2 hours later. "My Engine Light Came On As Soon as I Left Your Lot"

So why it took two weeks i don't know.
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Old 07-15-2009
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Well i noticed it only comes on under a heavy load first time mash the gas and second time pulling a boat so could this be fuel related lean fuel mixture is in there list of possibilities too. I just went down and reset the code no light drove it no light! Idk Im sure its going bad just not that bad yet.
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Old 07-15-2009
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Quote:
Originally Posted by Martyr View Post
My understanding is bank 1 (drivers side) sensor 2 second sensor downstream.

Now as far as the light going out, and then coming back on 2 weeks later, i dunno why 2 weeks. Likely would have gone out in the first place because something changed, so it reset, and then realized, Crap same thing is still happening. But usually after a driving cycle the light should come back on (if it is going to)

Now this is USUALLY. We have had countless times here where we have driven a customers vehicle all over, we have had a tech drive the vehicle home, on and on and on, and no light comes back. So we release to the customer, they phone us about 2 hours later. "My Engine Light Came On As Soon as I Left Your Lot"

So why it took two weeks i don't know.
Well as far as cylinders go bank 1 is on passenger!
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Old 12-02-2016
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Quote:
Originally Posted by "Monster Truck" View Post
You guessed it CEL. Im being told Bank 1 sensor 2 nobody can tell me with one it is. The best answer i got two weeks ago was front drivers side. So i replaced it and the lights back on again after 2 weeks. Today a different guy at the shop told me it was passenger rear. WTF I saw the glossary of codes Fx4wannabe had and it helped but i don't get all of it. Witch sensor is it? And why would the light go off for 2 weeks then come back on if it was the wrong sensor? Some body help!
Short and to the Point: Bank 1 is the PASSENGER Side. Sensor 2 is the One BEHIND your Catalytic Converter. (Look at your CAT, and you will see it. Can't miss it!).
But I want to say something about your Need to Replace it. Have you checked your >>Plugs
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