Is the Mass valid if the priest is in mortal sin?

[CentralFLJames]

What happens in cases where a priest may not be in a pure state of grace (e.g. mortal sin) at the time he is administering the sacraments of penance and transforming the bread and wine into the Holy Eucharist during mass? Are the preparatory prayers that I assume the priest says during the rites of the mass and confession sufficient to resolve/remit his mortal sins? Or are those who receive the sacraments from a priest not in good standing with God become invalid?

 

[Peggy_Frye]

While a priest who celebrates Mass in the state of mortal sin commits a sacrilege, the sacrament would be valid. Canon 916 says, "A person who is conscious of grave sin is not to celebrate Mass or receive the body of the Lord without previous sacramental confession unless there is a grave reason and there is no opportunity to confess; in this case the person is to remember the obligation to make an act of perfect contrition which includes the resolution of confessing as soon as possible…”

The following is what’s required for a valid consecration:

1. The minister must be a validly ordained bishop or priest.
2. The intention of doing what the Church does (to produce the effects of the sacraments).
3. The proper matter required for a valid celebration of the Eucharist
4. The proper form (words of consecration—“This is my Body” and “This is . . . my Blood”)

A priest cannot absolve himself. He must go to confession.

Can. 960 Individual and integral confession and absolution constitute the only ordinary means by which a member of the faithful conscious of grave sin is reconciled with God and the Church. Only physical or moral impossibility excuses from confession of this type; in such a case reconciliation can be obtained by other means.

For a valid absolution:
Can. 965 A priest alone is the minister of the sacrament of penance.

Can. 966 §1. The valid absolution of sins requires that the minister have, in addition to the power of orders, the faculty of exercising it for the faithful to whom he imparts absolution.