95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

!HELP! Code: p0136

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Old Jan 15, 2015 | 09:37 AM
  #1  
eliasfox's Avatar
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!HELP! Code: p0136

I just bought a fresh 96 Tacoma. Everything is legit on it, totally maintained, only one owner. The issue I am running into is that the check engine light keeps coming on.

I ran the code on it and I got: p0136 (Bank 1, Sensor 2)

What does this mean? What are the possible issues? My only hunch is that the upper exhaust manifold is cracked and spitting out a ton of exhaust. Would this have anything to do with that code or is it something else? Help.
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Old Jan 15, 2015 | 01:37 PM
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From: I live in New Tripoli Pa out in the woods
Red face

What it means is the down stream O2 sensor is not working or being seen by the ECM.

This can be the sensor itself

It can be the wiring from the sensor to the ECM

It can be the ECM
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Old Jan 17, 2015 | 05:07 PM
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Phoenix Ray's Avatar
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From: Phoenix
P0136

Check age of cat and vacuum/exhaust leaks too. Would recommend Denso or NGK O2 sensor, if it has to be replaced. Good luck.
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