I have a volvo s80 t6. it just started throwing a camshaft position sensor code, P0014. It runs fine goin down the road but when i come to a stop it stumbles and surges. but it realy only does it when the car is warm. also a little background, the car use to surge at idle but when it would get warm it was fine, but no codes, i pulled out the spark plugs a few days before i got the recent code, they had alot of deposits on them, i cleaned them off and put them back. what would cause all of the deposits? the plugs are only 6 months old. but like i said the code didnt come on til after that. also the cooling fan doesnt work, i put a new coolant temp sensor in and still nothin. and i put a whole new fan assembly in and nothin.. Im about to run it into the lake.