What is P0404 Engine Code

p0404  It threw a p0404 code With this code, the car has no boost It starts up great, idles perfectly but I have no P0404 Exhaust Gas Recirculation Circuit RangePerformance EGR Valve

Code P0404 is triggered when the EGR position is not as the ECM expected and the most common cause is the EGR valve partly stuck open from carbon buildup on the Watched some YouTube videos about P0404 and I amwas about to performsee if cleaning, or replacing the EGR valve andor gasket would solve the issue

P0404 is a EGR circuit code You most likely have an exhaust or intake leak which is why it's running rich Check the engine bay for soot or oil 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