My 2009 Honda Accord is a 4-cylinder with automatic transmission. The radio (non-Nav., non-XM) changes frequencies on its own. Sometimes it's triggered by another electrical activity, such as turn signal or wipers. Sometimes it just does it because it wants to [outside electrical interference?] if it's on 87.3 it'll move to 87.1).

My radio (non-Nav, non-XM) changes frequencies on its own. Sometimes it's triggered by another electrical activity, such as my activating the turn signal or wipers. Sometimes it just does it because it wants to (maybe outside electrical interference??) It will move 1 dial click (e.g. if it's on 89.3 it'll move to 89.1). I'm wondering if I have to call the Ghostbusters.