Well, now, Tal, you may be stupid ...... but, that's OK ....... we have several "stupid" members.
Suggestions:
Plan A - if the car is still under warranty, take it into the dealer.
Plan B - erase the code, maybe you will get lucky and it won't come back.
Plan C - disconnect the battery for a minute or so, then reconnect.
Plan D - follow the link given in @
Ultramaroon 's post.
Plan E - take it to an auto shop or the dealer and tell them your car is all messed up and you want them to fix it.
humfrz