I just bought a 2010 Passat 2.0T with 106,000 miles and within a few days the check engine light came on. I checked the code and it was for the cam shaft position sensor. I changed the sensor and cleared the code but 2 days later the car lurched while pulling into the garage and the check engine light came back on. I had it looked at by a mechanic who said the car is fine and reset the check engine light again. 2 days later the car lurched in reverse backing out of a parking space and the check engine light came on again. Another mechanic thinks the timing chain may be stretched. Has anyone experienced this or have any knowledge of what this could be? Any help would be appreciated.