My dads car is throwing the code 1615 which I believe is "NATS Malfunction", could someone tell me exactly what that is and how I could possibly fix it? Thanks in advance.

Nissan Anti Theft System.

I got this code after I had a locksmith program my new keys. I reset the code and have never heard from it again.

Thanks you guys. That is it, my dad lost his key and had a locksmith reprogram one. I just res*** the CEL and it went away. Thanks again.