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I have a 2004 Mitsubishi Galant and am getting the p0155 code. So ok bank 2 circuit 1 O2 sensor is bad. There are 2 upstream O2 sensors. Is this location the one on the alternator side or the other side of the heat shield. In general, is bank 2 driver side or left side of engine?

Vehicle: 2004 Mitsubishi Galant 2.4L 4 Cyl

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P0155 Cylinder 2. 3 heated oxygen sensor heater circuit (sensor 1)

Front part of the engine toward the radiator

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Hello there, in your case bank2S1 is the one at the driver side the top one. On a side note, you can always verify by checking the firing order of the vehicle. Hope this helps.

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