This depends on whether it was noted as a security feature at time of risk evaluation.
If you tell them you have an alarm.. then the premium is based on you arming the alarm when the house is unoccupied.
Same with the electric fence.
If it goes into limp, it would store the code and a reader with read it.
Personally sounds like a maf/map sensors or TB issue..
Take it to a non dealers, tbh dealers only know how to replace a part or service a car and nothing else.
How many vehicles.
However the executor should have paid it or the person who was going to take it on should have..
You won't win this in my experience