U0109
0 owner reports and 128 manufacturer filings across 34 model years from Ford, Genesis, Hyundai, Lincoln.
Where U0109 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2019 Ford Explorer | Electrical System | 9 | — |
| 2018 Ford Explorer | Electrical System | 9 | — |
| 2021 Ford Explorer | Electrical System | 6 | — |
| 2021 Ford Expedition | Electrical System | 5 | — |
| 2020 Ford Expedition | Electrical System | 5 | — |
| 2019 Ford Expedition | Electrical System | 5 | — |
| 2018 Ford Expedition | Electrical System | 5 | — |
| 2020 Ford Explorer | Power Train | 5 | — |
| 2020 Ford F-150 | Power Train | 5 | — |
| 2020 Ford Transit | Power Train | 5 | — |
| 2019 Ford Transit | Electrical System | 5 | — |
| 2018 Ford Transit | Electrical System | 5 | — |
| 2021 Lincoln Aviator | Power Train | 5 | — |
| 2020 Lincoln Aviator | Electrical System | 5 | — |
| 2021 Lincoln Navigator | Electrical System | 5 | — |
| 2020 Lincoln Navigator | Power Train | 5 | — |
| 2019 Lincoln Navigator | Electrical System | 5 | — |
| 2018 Lincoln Navigator | Electrical System | 5 | — |
| 2022 Ford Expedition | Electrical System | 4 | — |
| 2022 Ford Transit | Electrical System | 4 | — |
| 2022 Lincoln Aviator | Electrical System | 4 | — |
| 2022 Lincoln Navigator | Electrical System | 4 | — |
| 2023 Ford Transit | Electrical System | 2 | — |
| 2023 Ford Bronco Sport | Power Train | 1 | — |
| 2022 Ford Bronco Sport | Power Train | 1 | — |
| 2024 Ford Expedition | Unknown Or Other | 1 | — |
| 2024 Ford Transit | Unknown Or Other | 1 | — |
| 2020 Genesis G80 | Fuel System, Gasoline | 1 | — |
| 2019 Genesis G80 | Fuel System, Gasoline | 1 | — |
| 2018 Genesis G80 | Fuel System, Gasoline | 1 | — |
| 2017 Genesis G80 | Fuel System, Gasoline | 1 | — |
| 2016 Hyundai Genesis | Fuel System, Gasoline | 1 | — |
| 2024 Lincoln Aviator | Unknown Or Other | 1 | — |
| 2024 Lincoln Navigator | Unknown Or Other | 1 | — |
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
What it gets filed under
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names U0109. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- SSM 524832024-04-25 · Unknown Or Other
- Some 2018-2019 Explorer and 2018-2024 Transit/F-150/Expedition/Navigator vehicles may exhibit an illuminated MIL with diagnostic trouble codes (DTCs) P0627, P025A, P025B, P00C6, P008A and/or U0109 stored in the powertrain control module (PCM). Diagnosis should include checking for an intermittent or partial disconnect of the harness to the fuel pump control module (FPCM) connector, connector pin p
- SSM 524822024-04-25 · Unknown Or Other
- Some 2020-2024 Explorer/Aviator vehicles may exhibit an illuminated MIL with diagnostic trouble codes (DTCs) P0627, P025A, P025B, P00C6, P008A and/or U0109 stored in the powertrain control module (PCM). Diagnosis should include checking the fuel pump monitor (VE518) and/or a fuel pump control (VE225) circuits, connector pin push-outs, damaged pins/terminals, and/or loose/corroded grounds. Inspect
- SSM 515372023-04-04 · Power Train — Automatic Transmission — Control Module (Tcm/Pcm/Tecm)
- Some 2021-2023 Bronco Sport vehicles may exhibit an illuminated MIL with diagnostic trouble codes (DTCs) P025A, P025B, P00C6, P008A, P0627 and/or U0109 stored in the powertrain control module (PCM). This may be due to an intermittent or partial disconnect of the harness, connector pin push-outs or loose/corroded grounds to the fuel pump control module (FPCM) connector, PCM connector and/or battery
- SSM 513062023-01-19 · Electrical System
- Some 2018-2023 F-150, Expedition, Navigator, Transit, Aviator and Explorer vehicles may exhibit an illuminated MIL with diagnostic trouble codes (DTCs) P0627, P025A, P025B, P00C6, P008A and/or U0109 stored in the powertrain control module (PCM). This may be due to an intermittent or partial disconnect of the harness to the fuel pump control module (FPCM) connector, connector pin push-outs, damaged
- SSM 508412022-06-08 · Electrical System
- Some 2018-2022 F-150, Expedition, Navigator, Transit, Aviator and Explorer vehicles may exhibit an illuminated MIL with diagnostic trouble codes (DTCs) P0627, P025A, P025B, P00C6, P008A and/or U0109 stored in the powertrain control module (PCM). This may be due to an intermittent or partial disconnect of the harness to the fuel pump control module (FPCM) connector, connector pin push-outs, damaged
- SSM 506612022-04-06 · Power Train
- Some 2018-2022 F-150, Expedition, Navigator, Transit, Aviator and Explorer vehicles may exhibit an illuminated MIL with Diagnostic Trouble Codes (DTCs) P025A, P025B, P00C6, P008A and/or U0109 stored in the powertrain control module (PCM). This may be due to an intermittent or partial disconnect of the harness to the fuel pump control module (FPCM) connector, connector pin push-outs or loose/corrod
What U0109 means
Source: SAE J2012 / OBD-IIU0109 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about U0109
Source: NHTSA files and the OBD-II standardCan I keep driving with U0109 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.