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Discussion Starter · #1 ·
I have been having this intermittent check engine light come and go for some time now and it came on yesterday as I was driving near an Auto Zone. So I popped in real quick before it went away. The ODB Scanner read P2236. The interwebs says that it is: O2 Sensor Signal Circuit Shorted to Heater Circuit (Bank 2 Sensor 3). I was going to go ahead and replace the O2 sensor but now that I think about it I want to make sure that I understand the fault before I start replacing stuff.

Does anybody have any insight on this? If not can you provide a link to a schematic of the oxygen sensor system?
 
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