Nissan immobilizer system 3
https://alpha-wiki.win/index.php/What_Does_the_Car_Key_Symbol_Blinking_on_Your_Nissan_Dashboard_Mean%3F
The Nissan immobilizer system is an anti-theft feature that prevents the engine from starting unless the correct key with the embedded transponder chip is used. It's integrated into the ignition and works seamlessly, giving drivers peace of mind when parking in unfamiliar areas. If the wrong key is detected, the system blocks fuel and ignition, keeping the car secure.