timbob

hi all new to the website finally own my first bimmer OK here goes it says its the exhaust cam sensor i changed it today reset the fault codes and law and behold 2 mins later its back now ive read some stuff that it could be oil getting into the connectors wire has snapped on the loom and even maybe a missing tooth on camshaft wheel? Bascially what the best plan of action i can take ive ordered some electical cleaner because the rocker has been leaking so it might be oil? where would i start checking the cables? and obviously garage job for the sprocket i got some other issue like radiator not coming on heared engine get hot but rad fan cshould come on around 105? and the diffy is noisy so i do that myself any help would be great for got to mention 320i es e90 n46 and i swapped the inlet and outlet sensor and it stays the same possible? timing slip?