WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
B2198
NATS ANTENNA AMP
Inactive communication between NATS antenna amp. and BCM.
Harness or connectors
(The NATS antenna amp. circuit is open or shorted)