2008 Chrysler 300 rubbing/grinding noise

I just purchased a 2008 chrysler 300 a month ago. When I first got the car it had the tire icon on so I brought it to dealer and all sensors were ok. They reset sensors and was good for a week and now it's back on and all tires are at correct psi. Dealer can't figure out what's wrong so they have been putting me off. Now last night I was making a right turn and this sound started happening from the front of car, like something was rubbing on the wheel and every time I turn right it's getting worse with the noise. I also get the noise when I'm backing up the car and turning. If I turn really sharp it's really loud inside like I have a flat tire. Please help me if possible