Bank 2 Sensor 2 where is that?
I just had my new converter put on because I the CEL was on and the code was P0421 Warm Up Catalyst Efficiency Below Threshold (Bank 1). So now there is a new code, P0161 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2). This one popped up after replacing the rear catalytic converter and the 2 O2 sensors attached to it (thought I should replace them, been driving with that error code for about a year now).
So where is bank 2 sensor 2? Is it on the front cat? that's not one of the new O2 sensors I just put on is it? I thought that before I try and replace the O2 sensor, i would try and clean the MAF sensor, then reset the ECU by removing the battery for an hour then putting it back on. Do you think that would be better?