'03 Mitsubishi Montero Engine light ON P0161 Pls help!!!

Question

My check engine light is on and I find out It P0161 2/2 Oxygen sensor heater element malfunction.? Pls tell me where this is locatted at i have the diagram here pls tell me which one is defective.Thanks.

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Answer 1

O2 sensor heater circuit malfunction,Cylinder bank 2,sensor two.It is the oxygen sensor on the side of the engine that the # two cylinder is and it is behind the catylitic converter and in front of the muffler.