So from what I've read here and what my FSM says is that p0161 means there is a heater failure in the bank 2 sensor 2 o2 sensor. It's also throwing a p0158 code which my FSM says is a short in the o2 sensor. So I'm pretty sure it needs replaced at this point. So where is it at? I looked in my FSM and I'm having a little trouble finding something that shows where it's at. I looked in section 25 which is the Emission Control systems but only found the code meanings. I looked in section 11 also which is exhaust and no luck there. I'm assuming this one has Cali emissions which means 4 sensors.

I've heard here say that all the sensors need to match also, same brand and such. So do they really? I was looking at the NTK ones since I've heard good things about them. I know where the o2 sensors are, I just don't know which one is which. If anyone has any pics of where it's located I'd appreciate it.