Egr valve is clogging with soot. Car runs ok for a month or two then loses powe on 1996 Saturn SL2

car runs ok for month or two then starts sputtering and losing power. Egr valve has soot in it.

Asked by for the 1996 Saturn SL2
1 answer 1 comment
WHAT ARE THE ENG CODES IF ANY?
autozone diagnostic said egr valve faulty. bought new one and no "check engine" lights are on. thanks also replace spark plugs