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2019
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Grand Cherokee Trackhawk
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Repair and Diagnosis
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Engine Performance
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System
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6.2L - DTCS P0139 To P0440
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DTC Troubleshooting
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P027D-Fuel Pump Module "B" Control Circuit High
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Set Condition
Set Condition
The Fuel Pump Control Module (FPCM) 2 detects that the voltage on the Fuel Pump Relay Output circuit is above 16.0 volts for 2.5 seconds.