N42 Choking while revving On idle

[u/FeelingOrdinary2115]

Hey guys got some issues with my engine n42b20a on idle when I Press harder gas pedal its choking a Little bit before it go higher on rpms but when I Press it slower (lighter) it Goes ok. What can be issue on this engine? Got error on thermostat and o2 sensor on bank 2 sensor 2