Car won't start on first turn?

So i bought a 2004 Infiniti G35 coupe when we went to the dealer it started perfect, today it has the check engine light and it takes two turns to turn it on, I didnt buy the extended warranty but it hasnt even been a day and this happened, whats the best way to approach this most likely its the started according to the check engine diagnostic, should I ring it up to the dealer and ask what can they do or what?