[Paul. Ahomana]

Hi my Nissan Navara the NATS light came on, so I couldn't turn the ignition key on thanks.

 

[landmannnn]

Hi my Nissan Navara the NATS light came on, so I couldn't turn the ignition key on thanks.

There's a chip in the key which signals to a ring next to the ignition barrel, which in turn communicated with the NATS (security module).

Try a different key. Try a reset ( disconnect battery and press the horn).

If that doesn't work out gets way more difficult.