eliasfox

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.

wyoming9

iTrader: (1)

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

Phoenix Ray

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