U029D
0 owner reports and 68 manufacturer filings across 26 model years from Chevrolet, Ford, GMC, Volvo.
Where U029D shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2017 Ford F-250 Super Duty | Engine | 6 | — | |
| 2017 Ford F-350 Super Duty | Engine | 6 | — | |
| 2017 Ford F-450 Super Duty | Engine | 6 | — | |
| 2019 Ford F-250 Super Duty | Electrical System | 3 | — | Battery → |
| 2018 Ford F-250 Super Duty | Electrical System | 3 | — | Battery → |
| 2019 Ford F-350 Super Duty | Engine | 3 | — | |
| 2018 Ford F-350 Super Duty | Electrical System | 3 | — | Battery → |
| 2019 Ford F-450 Super Duty | Electrical System | 3 | — | Battery → |
| 2018 Ford F-450 Super Duty | Electrical System | 3 | — | Battery → |
| 2022 Volvo V60 | Engine | 3 | — | |
| 2021 Volvo V60 | Engine | 3 | — | |
| 2022 Volvo S60 | Engine | 2 | — | |
| 2021 Volvo S60 | Engine | 2 | — | |
| 2021 Volvo S90 | Engine | 2 | — | |
| 2022 Volvo V90 | Engine | 2 | — | |
| 2021 Volvo V90 | Engine | 2 | — | |
| 2022 Volvo XC40 | Engine | 2 | — | |
| 2021 Volvo XC40 | Engine | 2 | — | |
| 2022 Volvo XC60 | Engine | 2 | — | |
| 2021 Volvo XC60 | Engine | 2 | — | |
| 2022 Volvo XC90 | Engine | 2 | — | |
| 2021 Volvo XC90 | Engine | 2 | — | |
| 2018 Chevrolet Express | Electrical System | 1 | — | Battery → |
| 2018 GMC Savana | Electrical System | 1 | — | Battery → |
| 2022 Volvo C40 | Engine | 1 | — |
Showing the 25 model years where U029D appears most; it is on file for 26 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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U029D by make
The same record, one make at a time: the model years, bulletins and owner reports that name U029D on that maker’s vehicles.
What it gets filed under
68 manufacturer filings name U029D. 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.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names U029D.
- CBR-2131 Service bulletin2022-08-29 · Engine And Engine Cooling
- USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E
- TSB 20-2067 Service bulletin2021-02-01 · Engine And Engine Cooling
- Some 2017-2020 F-Super Duty vehicles equipped with a 6.7L engine built on or before 10-Jun-2020 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) U029D, U029E, P22A7 and/or P2209 in the powertrain control module (PCM). This may be due to water intrusion into the oxides of nitrogen (NOx) connectors. To correct the condition, follow the Service Proced
- TSB 18-2365 Service bulletin2019-02-19 · Electrical System
- Some 2017-2019 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) U029D and/or P2209 in the powertrain control module (PCM). This may be due to water intrusion.
- TSB 18-2365 Service bulletin2019-02-19 · Electrical System
- Some 2017-2019 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) U029D and/or P2209 in the powertrain control module (PCM). This may be due to water intrusion.
- TSB18-2100 Service bulletin2018-03-26 · Power Train — Automatic Transmission — Control Module (Tcm/Pcm/Tecm)
- Some 2017 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated MIL with diagnostic trouble code (DTC) U029D and/or P2209 in the powertrain control module (PCM). This may be due to water intrusion. Follow the Service Procedure steps to correct the condition.
- 17-NA-219 Service bulletin2017-10-01 · Electrical System — Wiring
- Diagnostic Tip for Malfunction Indicator Lamp (MIL) Illuminated - DTC P249D, P249E, U029D, U029E Set Some customers may comment that the MIL is illuminated. The technician may find one or more of the following DTCs set: U029D U029E P249D P249E Note: The graphic above depicts an example of a torn and missing seal. Moisture intrusion past a damaged (1) seal located in the connect
What U029D means
Source: SAE J2012 / OBD-IIU029D 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 U029D
Source: NHTSA files and the OBD-II standardCan I keep driving with U029D 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.