P0404 -

code p0404  This code points to either carbon buildup or a bad EGR valve However that doesn't rule out the following: Monte Carlo Repair Help - P0404 engine code

Failure code of P0404 had been recorded I removed the EGR valve and discovered that small pieces of carbon had logded the valve open  #p0404 · P0404 Exhaust Gas Recirculation Circuit RangePerformance EGR Valve

The P0404 code indicates a potential issue with the EGR system in your vehicle Causes of a P0404 code include a dirty or malfunctioning EGR just one code p0404 Exhaust Gas Recirculation Circuit RangePerformance took of the egr with the cooler detached the egr cleaned it ( wasn't