UK Car Repair Questions? Ask a Mechanic for Answers ASAP
Hi, I'm Greg (Indy-Tech).Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP.Rgds Greg.
Yes sadly you do have a NATS security issue .
Flashing light indicates the system is not recognizing the key.
You need to get hooked up to a nissan diagnostic scan tool and check for NATS malfunction codes .
This is typical when the NAT system loses power from the main battery and could also be the cause of stay alive power
Doing a diagnostic scan of the system will make this clear .
You will have to get the car checked by the Dealer or a mobile key locksmith who also carry diagnostic tools and programming software to program your keys if needed.
Here is a link to the mobile keysmith locator please click here
If you need further assistance with this issue then please get back to me with the reply box below .This is not a one answer and done i/we will stay with you until the problem is sorted out .Before rating poor or bad please get back to me as i'm here to help you and if i can't i will opt out so another expert can , we want you to be happy and have your problem sorted out and be a happy motorist .After rating there is no further cost for any other question relating to this problem Kind regards Greg..