a method and control system for a selective catalytic reduction catalytic converter and a diesel particulate filter includes a dpf control module that determines a particulate matter load progress of the dpf and generates a dpf regeneration request based on the pm load progress . the control system also includes an scr control module that selectively adjusts an ammonia load of the scr catalytic converter prior to regeneration of the dpf based on a storage capacity of the scr catalytic converter and the pm load progress .