P0430 code on my 04 Nissan titan came up. Bank 2 , which side is that? Front or

before you just start throwing parts at it.you need to have it scanned with the proper scan tool,while driving that shows live data.it could be anything from a vacuum leak,spark plugs,02 sensor,cat.converter,fuel injector leak,or a combination of these.this code is just possible causes,not meaning to replace a couple thousand dollars worth of sensors.get checked with proper scan tool. Possible causes - Three way catalyst converter Bank 2 - Exhaust tube - Intake air leaks - Fuel injectors may be faulty - Fuel injector leaks - Spark plugs may be faulty - Improper ignition timing - Engine Control Module (ECM)