92 buick riviera almost got it but need a bit help

So my dad sells me a car tells me its mint all it needs is brakes well he drags it over becuase its not on the road and leaves it in my yard i go to look at it and the check engine lights on, well i got the code its a 41 for an obd 1 which is cam sensor circuit fault, igntion control circuit fault
an i would think ok all i have to do is replace the cam sensor and be on my way but i noticed the oil pressure was maxed out again thought ok i just have to replace the oil pressure sensor/switch and go on my way, where i need your help i have no experince on any vehical thats over 8 years old sound sad and yeah it is its a 92 v 6 i was wondering where the cam sensor is located and if theres anything else that could create this problem an the other problem i dought it but i would like to give my dad the benifit of the dought and how would i find out which cam sensor it is i mean im sure i can use my dvm and find the culprit but i havent been in classes for a number of years and im rusty ill admit it and i dont want to throw parts at it also would a bad oil pressure sensor bring a milf code