P0174 is system too lean on bank 2 and P0411 is secondary air air system with incorrect flow. More than likely you have a vacuum leak on bank 2 somewhere. I would check for any vacuum hoses disconnected, broken or cracked. Also check for vacuum leaks around intake gaskets. Try spraying some carb or intake cleaner around all intake joints while engine is running. If engine sound changes at some point, the vacuum leak is probably in that area. Try doing this test before engine is too hot since these cleaners are flammable.
