Whirlpool Gas Range Control Board

A Whirlpool Gas Range (Model GS470LEMB) has been displaying "Sensor Open" Error codes (both E4 F3, and E0 F3) but replacing the sensors has not remedied the problem. The codes always display after using the oven and having shut it off. It seems that a control board is something to try next, but there are two control boards - one that is part of the touch pad, and one that is embedded behind the skins of the oven. How do I determine which "control board" is the one to focus on?