I have a 2009 IS 250. Yesterday the code P2004 popped up on my MaxiDiag with the text "Intake Manifold Runner Control Stuck Open Bank 1 a" However, I did not notice changes in the car's performance so I cleared the code and it didn't pop back up until the next morning. Again I did not notice any changes in the car's performance. Does anyone have any experience dealing with this code?

 

Intake Manifold Runner Binding Or Sticking
Faulty Manifold flow valve
Manifold flow valve harness is open or shorted
Manifold flow valve circuit poor electrical connection