P0404 EGR Valve flow malfunction

code p0404  This code points to either carbon buildup or a bad EGR valve However that doesn't rule out the following: Open or short in the 5 Volt reference circuit  Claim your FREE engine code eraser https: co

This code points to either carbon buildup or a bad EGR valve However that doesn't rule out the following: Open or short in the 5 Volt reference circuit  The glow plug light flashes all the time after around 3 mins after you start the van I took it to a garage and they read the fault code which was P0404 EGR

If you own a Saturn S-series and keep getting the code P0404 and your check engine light is on, you probably need to perform an EGR cleaning 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?