I think I busted my timing belt

I have a supercharged Nissan xterra, it was really low on gas so i drove to get it gas, but it wouldn't go over 20mph unless i put it in supercharge got gas it was fine driving out of the gas station but then it would only go to 20 again i got it to 45 almost turning onto the freeway and it turned off in the middle of driving it i made a u-turn and the power streeing went out thats how i know it shut down, it wont start up now, it will act as if it is going to turn on but never really starts up? now when i check the reader it says camshaft or crank shaft sensor (not sure witch one), but it didn't have the code there before this happened.