Check that the tyre pressures are all the same. It's not uncommon for me to find all four are at different pressures after a visit to the dealer. Reset as below:
.
There is always the possibility that you have a puncture, so give the tyres a once over and also check the pressures an hour or two later after you've reset the system.
lotta people on this forum have posted how tire pressures from the dealership day one, are way off.
Check the spare too ! the worst thing is when you need to use the spare ,tire and its about 30# low !