Did you swap the wiring harness on the plenum ?
What I have done successfully on swaps from one year to another is retain the intake plenum and attached harness that was originally on the car, since that is where all the important pin connectors, sensors emissions crap, etc. reside.
I only have the '02 shop manual, and that code isn't in it, so I can't help you with that specifically (to find an easier fix). My best advice: swap out the plenums and make sure that all of the important plumbing is hooked up.