P0341 Cam Pos Sensor Help!!!

Ok, here goes...last year in February I had this code come up and thought that by changing the plugs it would go away. Well, it did for about 7 months. Then my van was in an accident and at the shop for 3 months, then at the tranny shop for a few weeks after that, but during the time of driving it back and forth to those places and since, the light has blinked on and then gone off for a few days and the code is there. I replaced the cam pos sensor and now the ses light is on all the time and the code is still there. So I had a mechanic suggest replaceing all the coils. I did this this afternoon and no light, until it stalled a few times and the light came on and the code was set. Could I have gotten a bad sensor from the parts store? Or should I try something else?