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Federal filingsHome›Trouble codes› U0284
Diagnostic trouble code

U0284

1 owner report and 275 manufacturer filings across 30 model years from Ford, Lincoln, Subaru, Volkswagen.

Network Generic OBD-II code 275 manufacturer filings 1 owner report

Where U0284 shows up

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reportsParts
2019 Volkswagen Golf / GTIEquipment43—
2021 Volkswagen AtlasEquipment20—
2020 Volkswagen AtlasEquipment19—
2020 Volkswagen Golf / GTIEquipment18—
2020 Volkswagen JettaEquipment17—
2019 Volkswagen JettaEquipment17—
2019 Volkswagen TiguanEquipment17—
2019 Volkswagen AtlasEquipment16—
2018 Volkswagen AtlasEquipment16—
2020 Volkswagen PassatEquipment16—
2019 Volkswagen PassatEngine16—
2020 Volkswagen TiguanEngine16—
2018 Volkswagen JettaEquipment8—
2018 Volkswagen PassatEquipment4—
2017 Volkswagen PassatEquipment4—
2016 Volkswagen PassatEquipment4—
2017 Ford C-MAXElectrical System3—Battery →
2021 Ford Bronco SportPower Train2—
2018 Ford C-MAXElectrical System2—Battery →
2016 Ford C-MAXElectrical System2—Battery →
2022 Ford MaverickElectrical System2—Battery →
2019 Lincoln MKZElectrical System2—Battery →
2016 Lincoln MKZElectrical System2—Battery →
2019 Subaru ImprezaElectrical System2—Battery →
2018 Subaru ImprezaElectrical System2—Battery →

Showing the 25 model years where U0284 appears most; it is on file for 30 in total.

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.

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U0284 by make

The same record, one make at a time: the model years, bulletins and owner reports that name U0284 on that maker’s vehicles.

Volkswagen 17Ford 7

What it gets filed under

Equipment 144 Engine 76 Electrical System 21 Exterior Lighting 18 Power Train 3 Vehicle Speed Control 1

275 manufacturer filings name U0284. Start with what the maker wrote down.

A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.

Read the filingsSearch every bulletin →
Photo: Compagnons / Unsplash

Manufacturer filings that name it

Source: NHTSA manufacturer communications

Service bulletins and campaigns whose filed summary names U0284.

What U0284 means

Source: SAE J2012 / OBD-II

U0284 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.

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 about U0284

Source: NHTSA files and the OBD-II standard

Can I keep driving with U0284 stored?

Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. 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.

Where to go next

pages beside this code
Filed alongside P0496 Another code that appears in the same filings and owner reports as U0284.Filed alongside P0463 Another code that appears in the same filings and owner reports as U0284.Vehicle 2019 Volkswagen Golf / GTI The model year U0284 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.