OBD-II P0404 Light help - LS1TECH

P0404 EGR Valve malfunction #P0404 #EGR_Valve #Fix

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

p0404 EGR code P0404 · When Monitored: Engine running · Set Condition: The EGR flow or valve movement is not what is expected A rationality error

p0404 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