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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1573 (6.7L Diesel - DTCS P065A To P209F - 2500 Hd) >> DTC Troubleshooting >> P203B-REDUCTANT Level Sensor 1 Circuit Performance >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
DIESEL EXHAUST FLUID TANK LEVEL SENSOR 5-VOLT SUPPLY CIRCUIT OPEN/HIGH RESISTANCE
DIESEL EXHAUST FLUID TANK LEVEL SENSOR SIGNAL CIRCUIT OPEN/HIGH RESISTANCE
DIESEL EXHAUST FLUID TANK LEVEL SENSOR RETURN CIRCUIT OPEN/HIGH RESISTANCE
DEF SUPPLY PUMP ASSEMBLY
DIESEL EXHAUST FLUID DOSING CONTROL UNIT

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.