2011 G couple died at the stop light and when I tried to start it the dash went crazy with no starts. Finally started and put it in gear only to have it try to die again. Now it shifts real hard with sometimes loosing all power then taking off again with hard ****s. What the hell is going on?
The codes that I'm getting don't make sense.

Camshaft Position Sensor Bank 1 = P0340
Camshaft Position Sensor Bank 2 = P0345
Engine speed signal = P0725