P0404 code - serious?

Code P0404 is to some extent simply generic and there may be various causes for its activation Sometimes a poor or corroded electrical connector can affect

Explanation of what a P0404 Exhaust Gas Recirculation Circuit Range Performance engine

p0404 P0404 -EGR POSITION SENSOR RATIONALITY This is a rationality conflict with pintel position, the PCM does not like the info it is getting

p0404 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