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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 99 (6.7L Diesel - DTCS - P1192 To P21C3 - 3500 Cab & Chassis) >> Diagnosis and Testing >> P1C54-SCR NOx CATALYST MISSING >> Code Description >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. 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  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE - 6.7L  .