immobilizer fault Nissan

https://blast-wiki.win/index.php/Nissan_Security_Indicator_Light:_What_the_Car_with_Key_Symbol_Means

I was driving my Nissan home when the dashboard lit up with 'immobilizer fault.' The car started fine, but that warning kept flashing. Turns out the security system was glitching, so the engine wouldn't restart if I turned it off. Had to get the key fob reprogrammed at the shop—common issue with older models.