Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2009PICKUP F350 SUPER DUTY, 2D PICKUP, 6.8 Y, RWD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS (EXCEPT DIESEL & HYBRID)DTC DIAGNOSISDTC U0109: - LOST COMMUNICATION WITH FUEL PUMP CONTROL MODULE
2009 Ford Pickup F350 Super Duty, 2D Pickup, 6.8 Y, RWD, Standard
DTC U0109: - Lost Communication With Fuel Pump Control Module
2009 Ford Pickup F350 Super Duty, 2D Pickup, 6.8 Y, RWD, StandardSECTION DTC U0109: - Lost Communication With Fuel Pump Control Module
DTC U0109: - LOST COMMUNICATION WITH FUEL PUMP CONTROL MODULE
| Description: | The powertrain control module (PCM) monitors the fuel pump monitor (FPM) circuit for the presence of a duty cycled signal. If the FPM circuit is fixed at a low or high voltage, the PCM begins to increment a counter. The test fails when the PCM is still not detecting a duty cycled signal on the FPM circuit after a calibrated amount of time. | ||
| Possible Causes: |
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| Diagnostic Aids: | Check if the inertia fuel shutoff (IFS) switch is tripped. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to Pinpoint Test KC . | ||
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.