2000 Jetta Code P0341

My Jetta Was In An Accident, After Having It Repaired This Code Came Up P0341- Camshaft Position Sensor Circuit Range Performance. How Do I Get It Fixed Myself. When Writing Please Explain Were Do I Start From... Thanks Alot For Helping Out....... My Jetta Is A 2000 Gt, 2.0 4 Cy. Automatic With 116,941 Miles On It......