Here are your parts
Replacement parts for WHIRLPOOL KUDS01IJBS0 | AppliancePartsPros.com

Here is the tech sheet
https://www.servicematters.com/docs/wiring/Tech%20Sheet%20-%208269519.pdf

Also here is a service manual, not the greatest I've see but may be of some use
https://secured.whirlpoo...800643b6d/$FILE/KD01.pdf

Sounds like either the control board or the key pad is difficult to confirm which it is, so best way is to check the keypad, if OK then by default it is probably the control board.
Could be a stuck key
Try to run the diagnostics
Check the keypad with a meter for the stuck key
If it is a stuck key the keypad will have to be replaced,

Could try cleaning the connector but this usually only applies to opens not shorts (stuck key)
RIBBON CABLE CLEANING
Unplug the unit
Open it up
Remove the ribbon cable from the keypad to the control board at the control board.
Clean the edge connector.
If it is the type where there is not a connector just the insulation is removed, it can be cleaned with a pencil eraser. Do not use an ink eraser as it is too abrasive.
Check the tracks in the ribbon cable for hairline cracks. A magnifying glass helps here.
Would not hurt to clean the connector on the board. Use electronics contact cleaner or isopropyl alcohol and a tooth brush. Be gentle and do not reconnect till all the solvent evaporates.
Reconnect everything and give it a try.

Am off to the lake today so will not be available till Monday/Tuesday but there are many other on this forum who can give additional assistance if needed.