Hello,
I was getting a CEL code P2647 ROcker Arm Oil Pressure Switch . I changed the oil, cleaned the switch no difference. The engine will not go over about 3,500 rpm. I tested the switch direct to a 12v battery and can hear a click but believe it is defective. as the internal parts do not appear to move. Can anyone confirm something should move? I want to buy a new switch but I am confused. I cant find at NAPA, Autozone etc. Seems some call it other things like VTEC switch or valve control etc. Can I buy just the switch or solenoid? Or do I have to buy the entire valve assembly? Anyone have a link where to buy this? Maybe im searching for wrong name? see pic

 

Were u ever able to solve this problem or find that part? I am having the same issue. The car will rev over 3K RPMs but it triggers a flashing check engine light which is very bad. Once I let off throttle below 3K, the check engine light stays on, no flashing.