i have a 1999 civic si, the check engine light came on and i got a diagnostic and it said that my idol control system was bad it set off code-PO505 and i cant find out what part i need (ive herd that its the solinoid thats bolted to my intake manifold is that true) if not what is it called? like the name of the part that is needed, need to get fixed to get inspected.

 

iacv i have one let me know through pm