Fob unlocks doors but “key not detected” to start engine

I started the car (2006) with jump box (12v had been having issues), disconnected box, it was running for maybe 5 minutes, I noticed a bit of white smoke coming from under hood driver side, I jumped in to turn the car off and noticed the car had turned itself off. Since that happened, I’ve gotten the Key Not Detected flashing light upon trying to start; even though the fob still works to lock and unlock the doors. Chicken dance obviously does nothing bc the car does not recognize the fob as the original fob. Battery fairly new in fob (but I will replace again). I’ve tried with the SKS button depressed and non-depressed. Looking for any feedback possible. Thanks