You didn't mention what year/generation Accord you have but since you're asking in a 10th Generation Accord (2018 & newer) forum I'm going to assume your car is 2018 or newer. The maintenance minder will indicate when the spark plugs need to be replaced by showing a "4" in the sub menu. If you don't already have copies of the maintenance minder descriptions click on the links for copies of Maintenance Main Items & Maintenance Sub Items.