Pesky P0404 code 99 Silverado

code p0404  For most makes and models of vehicles, a trouble code P0404 is the result of an improper reading from your exhaust gas recirculation valve  P0404 = Exhaust Gas Recirculation Circuit RangePerformance The fault code is probably showing because your EGR valve is blanked

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  Is that the right code? With a quick search I did not find any manufacturers quide to solve that code Nevertheless here is guide how to remove exhaust manifold

P0404 EGR Valve malfunction #P0404 #EGR_Valve #Fix Code P0011 the 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