kaibee

Hello iv recently purchased a 2002 audi 2.7t, the Car shutters and jumps rpm,while in any gear, the vehicle will shut off when I put it in reverse. I threw a ob2 reader on it I got 2 codes:
P0346- camshaft position sensor A performance bank 2 circuit range
p0341- camshaft position sensor bank 1 or single sensor

I changed both of these sensors, and the problem is still there, what are your guys opinions? Could it be a timing issue?