Intercession, yes. Repentance? Essential

As we shall learn from Jeremiah, even the greatest intercessors cannot achieve divine forgiveness, if the party being prayed for remains in their sinful ways. As there is nobody who does not sin, Solomon anticipates in his prayer a future when the people need to turn consciously from their sin in order to attain divine forgiveness (cf. 1 Kgs 8:46). In other words, only if Israel turns from their evil ways and recommits to covenant obedience will Solomon’s intercession find a favorable hearing.—Standing in the Breach, page 284