P0404 Code

I am getting a p0404 pertains to the egr valve My question is, is this common for the valves to go bad? Do you think I could just clean it?

The vehicle lacks of power When I clear the p0404 fault code, the vehicle runs great for a couple of days or miles (costumer mentioned that

p0404 EGR Valve Code P0404 and this code came up, will changing the EGR valve solve the issue or is it a more demanding task ? Is it a difficult

p0404 Some vehicles may store EGR control performance code P0404 This occurs when the difference between commanded and actual EGR valve position is more than 10%