Hi Christopher.
Have you checked the plenums sounds like the ECU could be swimming or as at least got wet, also have you jump started the car recently as that can cause the 999999 problem, if so then a new EEprom or one from another IPK then introduced to the car with a T4
Drop Big Russ, Brian or Trikey a PM I am sure they will be able to help, thay may even see this post
PS Cyrano beat me to it