DTC B2190: NATS Antenna Amp.: Description
WARNING: This page is about a different car, the 2015 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
Performs ID verification through BCM and NATS antenna amplifier when ignition key is inserted and ignition switch turned ON.
Prohibits the start of engine when an unregistered ID of ignition key is used.