P0505 Idle Control System Malfunction

I recently installed the plenum gasket upgrade (thank you Hughes Engines!) but now I am getting the code, P0505 Idle Control System Malfunction. It does seem to idle a bit low. Anyone know how to fix this?

rayray1_97I recently installed the plenum gasket upgrade (thank you Hughes Engines!) but now I am getting the code, P0505 Idle Control System Malfunction. It does seem to idle a bit low. Anyone know how to fix this?

RAYRAY1_97 How did you fix it? Had the same problem last week durango 99, but my car wont start at all

1999 Dodge Durango. Enigine code P0505 still coming up even after 2 new IAC replacements and a computer flash. The truck runs great, drives great, idles great, and is doing what its supposed to. One thing i noticed when i was viewing live data was the TPS percentage never went to "zero" it stay at all times at "10.5%" I can't recall if that is normal. But i don't believe it is. What am i missing?