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Home >> Jeep >> 2021 >> Grand Cherokee Trackhawk >> Repair and Diagnosis >> Engine Performance >> System >> 6.2L - DTCS P0443 To P0688 >> DTC Troubleshooting >> P0628-Fuel Pump Control Circuit Low >> Possible Causes

Possible Causes

Possible Causes
FUEL PUMP PWM CONTROL CIRCUIT SHORTED TO GROUND
FUEL PUMP PWM CONTROL CIRCUIT SHORTED TO THE FUEL PUMP RETURN CIRCUIT
FUEL PUMP ASSEMBLY
FUEL PUMP CONTROL MODULE (FPCM)

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

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