It can occur that the tyre pressure light turns on during a ride. What you can do is, pump up the tyre when you go to the gasstation to fuel up the car. The tyres should be at 2.2 bar. You can also read about this in the car manuals.
Go to the glove compartment to reset the tyre pressure. Hold the reset button ‘SET’ down until the warning light flashes slowly three times and fades out. The tyre pressure has been reset. You can continue driving. 😃