U0284 on Ford vehicles
U0284 is named on 7 Ford model years (2016–2025): 13 manufacturer filings and 0 owner reports in NHTSA’s files, across C-MAX, Bronco Sport, Maverick, Ranger.
Which Ford model years name U0284
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2017 Ford C-MAX | Electrical System | 3 | — |
| 2022 Ford Maverick | Power Train | 2 | — |
| 2021 Ford Bronco Sport | Equipment | 2 | — |
| 2018 Ford C-MAX | Electrical System | 2 | — |
| 2016 Ford C-MAX | Electrical System | 2 | — |
| 2025 Ford Ranger | Power Train | 1 | — |
| 2024 Ford Ranger | Structure | 1 | — |
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.
Ford filings that name U0284
Source: NHTSA manufacturer communicationsBulletins and campaigns Ford filed with NHTSA whose summary names U0284. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- SSM 46857 Service bulletin2017-10-06 · Electrical System
- Some 2017 C-MAX vehicles built 1-Jun-2017 and through 26-Sep-2017 may exhibit an illuminated MIL with DTCs P26D0, P26CA, P059F, U019F, U0194, U091F and/or U0284. This may be due to water in the jumper harness connector C1651 and the attached connector on the active grill shutter actuator. Remove connector, clean and dry, add electrical grease Motorcraft XG-12 or equivalent to the terminals. Engine
- SSM 47790 Service bulletin2019-02-06 · Electrical System
- Some 2013-2019 Fusion/MKZ and 2013-2018 C-Max vehicles with 2.0L HEV/PHEV engine may exhibit multiple drivability or electrical concerns with one or more diagnostic trouble codes, being the most common P26C3, P26CA, P26D0, P2800, P2802, U019F and U0284. On Fusion/MKZ inspect connectors C146, C1651, C1812, C168C, C1717 and C134 for signs of water entry or corrosion. On C-Max, inspect connectors C13
- SSM 47790 Service bulletin2019-02-06 · Electrical System
- Some 2013-2019 Fusion/MKZ and 2013-2018 C-Max vehicles with 2.0L HEV/PHEV engine may exhibit multiple drivability or electrical concerns with one or more diagnostic trouble codes, being the most common P26C3, P26CA, P26D0, P2800, P2802, U019F and U0284. On Fusion/MKZ inspect connectors C146, C1651, C1812, C168C, C1717 and C134 for signs of water entry or corrosion. On C-Max, inspect connectors C13
- SSM 49496 Service bulletin2021-01-27 · Equipment
- Some 2021 Bronco Sport equipped with a 1.5L EcoBoost engine may exhibit a Check Charging System message and/or illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) U012D, U0284,and/or U042E. This may be caused by water intrusion into connector C202. Prior to performing Workshop Manual (WSM) diagnostics, inspect the C202 connector for signs of corrosion or water residue
- SSM 49976 Service bulletin2021-07-23 · Electrical System
- Some 2021 Bronco Sport equipped with a 1.5L EcoBoost engine built on or before 26-Jan-2021 may exhibit a Check Charging System message and/or illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) U012D, U0284 and/or U042E. This may be caused by water intrusion into connector C202. Prior to performing Workshop Manual (WSM) diagnostics, inspect the C202 connector for signs
- SSM 50973 Service bulletin2022-07-29 · Power Train — Automatic Transmission — Control Module (Tcm/Pcm/Tecm)
- Some 2022 Maverick vehicles built on or before 4-Apr-2022 equipped with 2.0L engine may exhibit a charging system warning indicator with diagnostic trouble codes (DTCs) U012D, U0284 and/or U042E stored in the powertrain control module (PCM). The vehicle may also exhibit a malfunction indicator lamp (MIL) with DTCs P0036:00 and/or P0138:00 stored in the PCM. This may be caused by water intrusion in
- SSM 50993 Service bulletin2022-08-03 · Electrical System
- Some 2022 Maverick vehicles built on or before 4-Apr-2022 equipped with 2.0L engine may exhibit a charging system warning indicator with diagnostic trouble codes (DTCs) U012D, U0284 and/or U042E stored in the powertrain control module (PCM). The vehicle may also exhibit a malfunction indicator lamp (MIL) with DTCs P0036:00 and/or P0138:00 stored in the PCM. This may be caused by water intrusion in
- SSM 53979 Service bulletin2025-06-25 · Power Train
- Some 2024-2025 Ranger vehicles may exhibit a "Check Charging System" message displayed in the instrument panel cluster (IPC) with diagnostic trouble codes (DTC) U012D, U0284, and/or U042E stored in the powertrain control module (PCM). This may be due to corrosion found in the active grille shutter lower connector (C1767). If no corrosion is found in this connector, refer to the Workshop Manual (WS
What U0284 means
Source: SAE J2012 / OBD-IIU0284 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 Ford and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs U0284 a known problem on Ford vehicles?
It is a documented one: NHTSA's files hold 13 manufacturer filings and 0 owner reports naming U0284 on 7 Ford model years (2016–2025). 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 Ford models does U0284 appear on most?
2017 C-MAX (3 documents), 2021 Bronco Sport (2 documents), 2018 C-MAX (2 documents).
Does U0284 on a Ford 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.