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The driver side is bank 2 on this engine as cylinder #1 is on the passenger side which makes it bank 1.
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With that type of temp difference, bank 2 converter has a partial restriction, most likely starting to melt and block the exhaust. The O2 sensor codes can just be due to this, as well as the egr code due to the higher exhaust temps affecting the egr performance.
I would start with replacing the converter and erasing the codes before replacing the O2 sensors or egr valve.
Correct, driver side is bank 2
very possible that the egr valve is stuck or even melted inside from the high exhaust gas temps.
Depending upon how long it was driven like this, it is also possible to have some burnt exhaust valves on bank 2, so you may want to do a compression check as well
Yes, that is within normal range parameters and not unusual on a 11yr old engine to see one bank slightly higher than the other. But they are all within acceptable parameters.