Code 340 on 01 Jetta VR6
 

This code came on in a 2001 VW Jetta VR6. I replaced the camshaft sensor because I was told that was the problem. The car drives excellent so I figured it was just a sensor. However after I replaced it I drove the car about 4 miles turned the car off and when I turned it back on the check engine light came back on and the same code came up, a 340. Anyone know what it is? If you need more details please ask. Thanks