I have a loud ticking noise coming from the top of my engine when t was running at idle. I did some listening with a long screw driver and found it coming from the AVAC AAC solenoid on the inlet manifold. If I unplug the brown plug it shuts up.

Question is, can it be fixed or do I need a new one?

And

Could it cause a car damage if I continue to use it as it is?