Lost Communication With Fuel Pump Control Module
Table of contents
U0109 LINCOLN Possible Causes
- Fuel pump monitor circuit open or short to ground
- Fuel pump monitor circuit short to voltage
- Damaged Inertia Fuel Shutoff (IFS) switch (if equipped)
- Damaged fuel pump control module relay
How do I fix code U0109 LINCOLN?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the U0109 LINCOLN code
The cost of diagnosing the U0109 LINCOLN code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
U0109 LINCOLN 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.