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Chrysler
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2018
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Pacifica L, Gas
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Repair and Diagnosis
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Engine Performance
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System
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3.6L - DTCS U0109 To U1504
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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
When this DTC is active, the FPCM will continue to run the Fuel Pump assembly at 80% duty cycle.
The MIL will illuminate.