Mike's Workshop Manuals
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Jeep
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2023
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Grand Cherokee 4xe
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Repair and Diagnosis
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Engine Performance
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System
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2.0L - DTCS P253F To U0109
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DTC Troubleshooting
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U0109 Lost Communication With Fuel Pump Control Module
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Default Action
Default Action
The MIL will illuminate.
When this DTC is active, the FPCM will continue to run the Fuel Pump assembly at 80% duty cycle.