Code P0340, the engine stalls, need some help

[youry]

Hy guys,

I already feel dizzy going thru tens of post about this issue and I'm still puzzled. For anyone that has ever had this code could you tell me what you ended up changing? Some say it's the intake cam sensor. Others the exhaust cam sensor. A few talk about MAF sensor. I wouldn't want to change half engine to realize is something else. So for people that had this problem could you point me to the right sensor?
btw: I had the check engine light On this morning, and read the codes with an OBD reader. The reader came up with code P0340. The car was kind of sluggish. I erased the code, everything was fine for about 10-15 miles and then after I started the car it would stall right away. I got home trying to keep the engine running every time I stopped to a red light. While driving even if I pushed the acceleration all way down the car won't have the power to accelerate. One more thing. The car stalled the first time about 2 weeks ago. I thought it was a one time thing. Anyway, sorry for the long post, can anyone help?