Have Percy faced Janus for his choice?

Sorry, I can't remember. In The battle of Labyrinth :

“I’m Janus,” both faces dicho in harmony. “God of Doorways. Beginnings. Endings. Choices.”
“I’ll see tu soon enough, Perseus Jackson,” dicho the right face. “But for now it’s Annabeth’s turn.” He laughed giddily. “Such fun!”

So... has Percy faced them for his own choice yet? cause If not, can it be the sacrifice Mars mentioned...?