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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 >> P204A-(Diesel Exhaust Fluid) REDUCTANT Pressure Sensor Circuit >> 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 
(K422) DEF PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE
DIESEL EXHAUST FLUID SUPPLY PUMP
DIESEL EXHAUST FLUID DOSING CONTROL UNIT

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