P0404 - Exhaust Gas RECIRCULATION (EGR) Control Circuit Range/Performance

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P0404 - EXHAUST GAS RECIRCULATION (EGR) CONTROL CIRCUIT RANGE/PERFORMANCE

Description:	The EGR valve commanded position compared to the actual position does not match within a calibrated range and time period.
Possible Causes:	EGR sensor EGR actuator EGR position circuit Powertrain control module (PCM) Variable geometry turbocharger (VGT) system Exhaust pressure (EP) sensor bias Initial learned EGR closed position Excessive exhaust pressure
Diagnostic Aids:	Components that affect air flow and pressure in the exhaust system can affect the EGR valve position compared to the commanded position. When a new EGR actuator is installed, the keep alive memory (KAM) needs to be reset to learn the new EGR valve closed position, refer to RESETTING THE KEEP ALIVE MEMORY (KAM) .
Application		Key On Engine Off	Key On Engine Running	Continuous Memory
All		refer to PINPOINT TEST W .