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Home › Jeep › 2021 › Grand Cherokee L Laredo, AWD › Repair and Diagnosis › Engine Performance › System › 3.6L - DTCS P2AF6 To U0428 › Diagnosis And Testing › U0109-Lost Communication With Fuel Pump Control Module › When Monitored

When Monitored

The FPCM diagnostics run continuously when the module is powered up

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