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Grand Cherokee Trackhawk
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Repair and Diagnosis (Single Page)
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Engine Performance
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6.2L - DTCS P0139 To P0440
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DTC Troubleshooting
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P027A-Fuel Pump Module "B" Control Circuit/Open
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Set Condition
Set Condition
The Duty Cycle command from the Powertrain Control Module (PCM) to the Fuel Pump Control Module (FPCM) 2 on the FPCM 2 PWM Control circuit is outside the calibrated threshold.