1999 Acura CL EGR Valve and Intake Manifold

My Check Engine Light is on and rec'd a P0401 OBDII code.

Is cleaning my EGR valve and intake manifold the best first step to take to clear the code?

I have a mechanic that works out of his garage, do you think he could fix it?

If not, what can I expect to pay the dealership/local repair shop for this cleaning?

Thank you