Without a full model number for your Whirlpool range, it is difficult to provide specific technical information. The F5 on most Whirlpool ranges will indicate that you have a problem with the oven door latch assembly or the oven door switch. Since you are seeing this error code when you are trying to set the self cleaning mode, this is likely the problem with your range. You could have a problem with the door switch. See if the oven light turns on and off properly when opening and shutting the oven door. If this switch is apparently operating properly then your failure is likely in the door latch assembly that normally locks the door before the clean cycle starts. You may need to replace this component.
If you need more help, resubmit your question with additional details and the full model number of your Whirlpool 458 range. Most Whirlpool model numbers will begin with letters such as GR. The model number may be on the left or right side of the oven door opening. It could also be on the frame of the oven in front of the right front leveling leg. Pull out the drawer below the oven to view this area.