Still chasing this. Put a “new” cabin sensor in. Now I’m rereading Neil’s post about cleaning it. I will try this with the old one.
And report back.

Got the alarm to reset via door locking unlocking. It tools about a dozen attempts, but it worked. Vehicle started. Now to get the heater core replaced and the car cleaned up. Thank you for your help on this. Anyone know someone who can program a fob? Dealerships wants 150 for one fob! Crazy kids!!