I don't have the 19" wheels, but I would still recommend keeping it at 1 or 2 psi
above the value shown on the inside of the door jamb.
That allows a bit of loss between check and still stay above a good value - else you could have too low a load index on our relatively heavy cars.
And, as always, measure with cold tires ... ideally without even having let the sun get them warmed up.
Z