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Home › Dodge and Ram › 2015 › ProMaster City Base › Repair and Diagnosis › Engine Performance › System › 2.4L - DTCS P2122 To U1504 › DTC Troubleshooting › U0109-Lost Communication With Fuel Pump Control Module › Default Action

Default Action

When this DTC is active, the FPCM will continue to run the Fuel Pump assembly at 100% duty cycle.
MIL light will illuminate.