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Home >> Jeep >> 2024 >> Grand Cherokee Summit >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 89 (2.0L - DTCS P3093 To U0151) >> DTC Troubleshooting >> U0109-Lost Communication With Fuel Pump Control Module >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
FUEL PUMP RELAY OUTPUT CIRCUIT OPEN/HIGH RESISTANCE
FPCM FEEDBACK RETURN CIRCUIT SHORTED TO GROUND
FPCM FEEDBACK RETURN CIRCUIT SHORTED TO VOLTAGE
FPCM FEEDBACK RETURN CIRCUIT OPEN/HIGH RESISTANCE
FUEL PUMP ASSEMBLY PWM CONTROL CIRCUIT SHORTED TO GROUND
FPCM GROUND CIRCUIT OPEN/HIGH RESISTANCE
FUEL PUMP CONTROL MODULE (FPCM)
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .