I have used it on a P38 I had last year. It worked then. It was a 98 US model which I was told the same thing, we don’t have the immobilizer on the US models. Yet there I stood, turning the key in that bizarre sequence and sure enough the car turned over. Didnt stay on long but it started.Pretty sure we don’t use the emergency lock code here in the states. Not used in this market the way I under and it.
P38 is a piece of crap by the way!