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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 212 (6.7L - DTCS P0299 To P0604 - 2500 & 3500) >> Diagnosis And Testing >> P0401-EGR System Performance >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2012 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
EGR SYSTEM LEAK
INTAKE AIR SYSTEM LEAK
AIR FILTER RESTRICTION
EGR COOLER LEAK
EGR COOLER FOULING
CROSSOVER TUBE RESTRICTION
INTAKE AIR HEATER RESTRICTION

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE - 6.7L  .