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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 435 (6.7L Diesel - DTCS P1209 To P2281 - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> P1C54-SCR NOX Catalyst Missing >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
DEGRADED, DILUTED, OR INCORRECT DIESEL EXHAUST FLUID
DIESEL EXHAUST FLUID DEPOSITS IN THE DECOMPOSITION TUBE
EXHAUST SYSTEM LEAKS
MALFUNCTIONING DIESEL EXHAUST FLUID DOSING SYSTEM
MALFUNCTIONING SCR CATALYST

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