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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 330 (4.7L - DTCS P0223 To P0593 - 1500) >> Diagnosis And Testing >> P0404-EGR Position Sensor Performance >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
EXCESSIVE RESISTANCE IN THE (F856) 5-VOLT SUPPLY CIRCUIT
(K35) EGR SOLENOID CONTROL CIRCUIT EXCESSIVE RESISTANCE
(K34) EGR SENSOR SIGNAL CIRCUIT EXCESSIVE RESISTANCE
(K900) SENSOR GROUND CIRCUIT OPEN
(Z908) EGR SOLENOID GROUND CIRCUIT OPEN
EGR SOLENOID ASSEMBLY
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  STANDARD PROCEDURE  .