03 nissan 350z stalls after startup
 

I have an 03 Nissan 350z with 102k miles on it. I checked the codes and I have a knock sensor code that popped up so I know I have to replace that but im not sure if thats whats causing the car to stall after starting it up when the engine is hot. However, when the car is cold it starts normally and idles normally however, after driving it and the car gets hot, once I turn off the car and start it back up while it is hot, the car revs up and continues to die down and stalls. When I press on the gas a little bit in this situation it goes to a normal idle and drives perfectly. has anybody got this type of problem and knows how to solve it? much help is appreciated.