trying to learn monitors for inspection have catalytic , O2 senser ,O2 heater on 1997 Cadillac Seville STS

have driven for over a week 250 miles or more wont learn those three monitors any tricks? we replaced egr valve now no check engine light and drove with scanner on, O2 readings for all 4 sensers appear good

Asked by for the 1997 Cadillac Seville STS