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Home›Trouble codes›U0109› Lincoln
Diagnostic trouble code · Lincoln

U0109 on Lincoln vehicles

U0109 is named on 10 Lincoln model years (2018–2024): 40 manufacturer filings and 0 owner reports in NHTSA’s files, across Aviator, Navigator.

Network 10 model years 40 manufacturer filings

Which Lincoln model years name U0109

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2021 Lincoln AviatorElectrical System5—
2021 Lincoln NavigatorElectrical System5—
2020 Lincoln AviatorElectrical System5—
2020 Lincoln NavigatorElectrical System5—
2019 Lincoln NavigatorElectrical System5—
2018 Lincoln NavigatorElectrical System5—
2022 Lincoln AviatorElectrical System4—
2022 Lincoln NavigatorElectrical System4—
2024 Lincoln AviatorNot specified1—
2024 Lincoln NavigatorNot specified1—

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Electrical System 25 Not specified 10 Power Train 5
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Lincoln filings that name U0109

Source: NHTSA manufacturer communications

Bulletins and campaigns Lincoln filed with NHTSA whose summary names U0109. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What U0109 means

Source: SAE J2012 / OBD-II

U0109 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. The record above is what Lincoln and its owners have filed about it; the code’s page across every make has the whole file.

From here
Get a model's new bulletins by email See what owners reported Look up a bulletin by its number Watch a VIN for new recalls

Common questions

Source: NHTSA files and the OBD-II standard

Is U0109 a known problem on Lincoln vehicles?

It is a documented one: NHTSA's files hold 40 manufacturer filings and 0 owner reports naming U0109 on 10 Lincoln model years (2018–2024). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.

Which Lincoln models does U0109 appear on most?

2021 Aviator (5 documents), 2020 Aviator (5 documents), 2021 Navigator (5 documents).

Does U0109 on a Lincoln mean it is recalled?

No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.

Where to go next

pages beside this code
Filed alongside P025A Another code that appears in the same filings and owner reports as U0109.Filed alongside P008A Another code that appears in the same filings and owner reports as U0109.Vehicle 2021 Lincoln Aviator The model year U0109 is filed against most often.The data Trouble codes by API GET /v1/dtc joins every code to bulletins and owner reports — free tier, no card.