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Home >> Chrysler >> 2009 >> 300 LX >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0579 To P0643 >> P0627-Fuel Pump Control Circuit/Open >> Possible Causes
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Possible Causes

Possible Causes 
INTERMITTENT DTC
(A109) FUSED B(+) CIRCUIT OPEN OR HIGH RESISTANCE
(F20) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN OR HIGH RESISTANCE
(K31) FUEL PUMP RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE
(K31) FUEL PUMP RELAY CONTROL CIRCUIT SHORTED TO GROUND
(K31) FUEL PUMP RELAY CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
FUEL PUMP RELAY
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See  DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure