I guess not a big deal to check it by letting some air out to see if it responds accurately...maybe one day when I have too much time ;)

What was the pressure loss in your case?

 I hadn't thought of conducting a little test like that, although as you say it wouldn't be hard and could be quite informative.

 

On this occasion the pressure in the affected tyre was down quite a bit (around 0.5bar from what I remember), so perhaps in such cases it can work out which wheel has the problem.  

 

I have rented cars in the US that can display the actual pressure in all tyres, so you don't have to get out of the car to check them. This is much more convenient of course as you can not only see where the problem is but also whether it's bad enough to need immediate attention or something you can deal with when you get to your destination.  A friend's Tesla does this too - but I suppose that car cost more than three times as much as mine, so one would expect a few more luxuries...

 I hadn't thought of conducting a little test like that, although as you say it wouldn't be hard and could be quite informative.

 

On this occasion the pressure in the affected tyre was down quite a bit (around 0.5bar from what I remember), so perhaps in such cases it can work out which wheel has the problem.  

 

I have rented cars in the US that can display the actual pressure in all tyres, so you don't have to get out of the car to check them. This is much more convenient of course as you can not only see where the problem is but also whether it's bad enough to need immediate attention or something you can deal with when you get to your destination.  A friend's Tesla does this too - but I suppose that car cost more than three times as much as mine, so one would expect a few more luxuries...

 

I had that system, and it's not all so sweet; especially if:

- you have 2 sets of tyres/wheels (to avoid error splash screen from popping up all the time and the error indication being permanent on, you need 2nd sensor set + programing and that ain't cheap)

- you do get a puncture and need to replace the tyre (risk of sensor damage and signal loss if you put the spare on).

For the basic task of informing the driver on potential problems, the ABS based solution is doing just fine. Anything else requires direct intervention anyway.