WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. 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
B2190
NATS ANTENNA AMP
Inactive communication between NATS antenna amp. and BCM.
Ignition key is malfunctioning.
Harness or connectors
(The NATS antenna amp. circuit is open or shorted)