code 13 ???

[granca69]

i have fault code 13 coming up ont he ecu which indicates no singal from cam angle sensor but signal from crank sensor 1. how can i fix this, i have tried changing the cam angle sensor with one from the wreckers, unless that one was stuffed also, my car was purchased hit at the front and i have repaied the damage but it did not hit the engine, only hit the timing case and the belt appears to be fine. nay helop here would be greatly apprecited guys. cheers for the help