Even if you are not sure, shut it down and pull the #$*%*# handle! Flying on one engine is not a big deal in most turbo props. And finding out that you have shut down a good engine due to a faulty warning is by far less worse than... A red fire warning means FIRE to me! (regardless of the detection system; I have shut down and extinguished a good engine on a Beech 99 (King Air) after a faulty warning; I am glad I did).
Happy Flights
(Off course no drill below 400' (500')...
