Nissan Repair Questions? Ask a Mechanic for Answers ASAP
I have some good ideas of what may be going on.
Do you own the code reader you used to pull codes? if so, does it have an option to view live data when the engine is running?
Thanks, ***** ***** concerned with live data because your symptoms could be from an intake leak at bank 2. This would cause bad idle and multiple cylinder misfires. Since you had an O2 sensor code for that bank as well, the lean readings might have triggered that as well.
Since you don't have a way to read live data and verify. Start by spraying some carb cleaner or something of that nature at the intake gaskets. Look for the idle to smooth or change when you find the leak. Also listed for an obvious hissing.
The hissing your listening for would be under the hood on the intake manifold area, not the exhaust.
im not too concerned with the throttle, its the intake manifold gaskets leaking that is my concern. You need to smoke the intake or use carb cleaner to spray around the manifold gasket with the engine running to look for the leak.