A friend of mine has a 97 Sebring (V6, Mitsubishi engine) Coupe on which the CEL light came on. Autozone came up with a P0153 code, which apparently is an oxygen sensor issue. Should I go and just replace the sensor? If so, which one is it? There are 3 of them I believe on that car.

 

Is the sensor the only problem? Is the car running rough? Typically that is a symptom of an oxygen sensor problem.

 

Car is not running any different then before. The P0153 code is what the scan came up with (Auto Zone). Apparently it's an O sensor, bank 2 sensor 1 I belive. I want to confim the code diagnostic (I will replace the sensor, the car has 130K miles and this is the original sensor), but I need to know which one is bank 2. The car has 3 sensors I believe.