Like nag dosh and  kal sarp dosh prêt dosh also do exits, placement of rahu ketu in lagna or in 5^th house forms primary combinations but need to be confirmed by prashna In prashna shahstra we consider maandi, if mandi is placed in 4^th house or in lagna then its concluded as prêt dosh or pret badha. If mandi is in even rashi its stree prêt aatma and if odd rashi its considered as purush prêt atma. Its close conjunction with 3^rd lord or 9^th lord indicates pitru dosh. Normally pitru dosh after remedies gives lot of good happenings. It is not always bad.