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Q:

where is the o2 senor Bank 2 senor 2 on 2003 Hyundai XG350

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need to replace obd code po156
(1) Answer
It is located on the right side which would be the side in front of the radiator, that would be your O2 Sensor, to find second one follow the manifold down and you will find the 2nd one, you have upstream and downstream, there is actually 4 oxygen sensors on the XG350