If you have noticed an elevated Page View number for your 404 page it is important to recognize that this is not an indication of a bug nor does it mean that something is broken.
The cause for an unusually high number of 404 page views comes down to bots or scripts looking for common URLs over your domain.
This is typical data for a 404 page.
As a result your page view analytics may display a high number of 404 page views and is not cause for alarm.