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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 332 (4.7L - DTCS P2107 To U147B - 1500) >> Diagnosis And Testing >> U0109-Lost Communication With Fuel Pump Control Module >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
FPCM FEEDBACK RETURN CIRCUIT OPEN OR HIGH RESISTANCE
FPCM FEEDBACK RETURN CIRCUIT SHORTED TO GROUND
FPCM FEEDBACK RETURN CIRCUIT SHORTED TO VOLTAGE
FUEL PUMP CONTROL MODULE
POWERTRAIN CONTROL MODULE

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