Well, it depends.
If you are using your Step 2 score to try to get an interview at a top program, in a top field. . . Theoretically, yes.
You already have a great Step 1 score, and you have interviews already lined up (don't need to get in the door). . . Theoretically, no.
In general, your step exams help you "get your foot in the door." When a program gets 200 applications for 3 residency spots, they need a quick and dirty way to cut out the "undesirables" and use Step scores for this.
Once you have an interview lined up, they won't cancel it if you bomb Step 2. In the interview they want to see if you're human, interesting, and want to work hard. The Step scores already told them you're intelligent.
Good Luck!