My PHEV ICE engine turns on from time to time and keeps on running for short periods of time.

I believe it last happened on Friday when I started the car and it was on for roughly 10 minutes. Have to say I was really wondering "what's wrong with the car" :)

Another thing that car is having is pressurized gasoline tank to avoid degradation of the fuel. If I'm correct this is reason behind it https://publications.lib.chalmers.se/records/fulltext/238063...