intake manifold runner control stuck open, Is it the one on the right (radiator Side) or left (windshield side) Solenoid motor to open and close manifold runner shot, or maybe spray with WD40 the linkage on runner?

I don't have quick access to my trouble code list so don't know if this code is for both sides. Could depend on model year? I do know that on my '98 there is a code for each side. Last winter I had both codes intermintantly come and go together. I thought it was odd that the left and right runner linkages would stick and unstick at the same time since they have independant actuators. The problem was finally diagnosed and fixed as a vacuum leak. Makes sense since the actuators are vacuum operated. Have you noticed anything else vacuum operated acting funny- perhaps part of the climate control? Hope this helps. -Jeff