Tyre pressure indicator

We are in Austria in the mountains and Kia reports me a too low tyre pressure on one side. Oddly the pressure is the same on the left as on the right. Depending on the altitude meter and temperature of the tyres it varies between 1,9 and 2,1 bar but still the entire left side is blinking. Can it be that the valve is frozen? Can I somehow reset the annoying blinking?