If you have really strong changes in temperatures the pressure and shape of tyre change.
As I recall it was very hot in Hungary the last few months, but has been more fluctuating down to the teens.... that can upset pressure warning system as it is improved over previous gens. Had the same thing last year on winter holiday in Austria. -10 degrees, checked pressure, pumped tyres up a bit, reset pressure. Back in the UK after a bit of harsher driving at +10 I got a pressure warning, all OK and roughly where I pumped them up to in Austria.
Sometimes it just needs a reset.