View topic - Code p0404-00 68

code p0404  If you have a P0404 code, it is likely that your vehicle is equipped with an electrically controlled EGR valve instead of a vacuum controlled one Additionally, It shows P0404 which I see is a EGR Valve I was looking around alittle and see this might be covered under some federal emission warranty

The P0404 diagnostic trouble code refers to the Exhaust Gas Recirculation system circuit having a rangeperformance issue The EGR system is Causes and Fixes P0404 Code: Exhaust Gas Recirculation Control Circuit RangePerformance

a low flow code p0401 is a restricted intake or p0405 would be either sticking egr pintle or carbon on the egr guy at The code may be thrown due to a clogged cat with too much back pressure anyone here ever encounter that or have any other thoughts?