car likes to randomly stall?

I got my Suzuki Reno as a 'good deal' from a friend. It has ended up being a bad decision all around. This car likes to randomly stall whether I am just sitting in idle or actually driving it around in the city. After this was happening I stopped and had AutoZone run codes off my car. They gave me the codes and I went to a mechanic looking for someone to replace my throttle body positioning sensor (because I was told this was the biggest issue). I did so, yet my car still likes to die spontaneously. It may just be me, but when it gets warmer out, my car tends to have a higher percentage of dying.