P04FB
5 owner reports and 421 manufacturer filings across 52 model years from Buick, Cadillac, Chevrolet, GMC.
Where P04FB shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2023 GMC Acadia | Unknown Or Other | 10 | 1 |
| 2021 GMC Acadia | Unknown Or Other | 10 | 1 |
| 2022 Buick Envision | Unknown Or Other | 10 | — |
| 2021 Buick Envision | Unknown Or Other | 10 | — |
| 2022 Cadillac CT4 | Unknown Or Other | 10 | — |
| 2021 Cadillac CT4 | Unknown Or Other | 10 | — |
| 2020 Cadillac CT4 | Unknown Or Other | 10 | — |
| 2022 Cadillac CT5 | Unknown Or Other | 10 | — |
| 2021 Cadillac CT5 | Unknown Or Other | 10 | — |
| 2020 Cadillac CT5 | Unknown Or Other | 10 | — |
| 2019 Cadillac CT6 | Unknown Or Other | 10 | — |
| 2022 Cadillac XT4 | Unknown Or Other | 10 | — |
| 2021 Cadillac XT4 | Unknown Or Other | 10 | — |
| 2020 Cadillac XT4 | Unknown Or Other | 10 | — |
| 2023 Cadillac XT5 | Unknown Or Other | 10 | — |
| 2022 Cadillac XT5 | Unknown Or Other | 10 | — |
| 2021 Cadillac XT5 | Unknown Or Other | 10 | — |
| 2020 Cadillac XT5 | Unknown Or Other | 10 | — |
| 2023 Chevrolet Blazer | Unknown Or Other | 10 | — |
| 2022 Chevrolet Blazer | Unknown Or Other | 10 | — |
| 2021 Chevrolet Blazer | Unknown Or Other | 10 | — |
| 2020 Chevrolet Blazer | Unknown Or Other | 10 | — |
| 2022 GMC Acadia | Unknown Or Other | 10 | — |
| 2020 GMC Acadia | Unknown Or Other | 10 | — |
| 2023 Buick Envision | Unknown Or Other | 9 | — |
| 2023 Cadillac CT4 | Unknown Or Other | 9 | — |
| 2023 Cadillac CT5 | Unknown Or Other | 9 | — |
| 2023 Cadillac XT4 | Unknown Or Other | 9 | — |
| 2019 Cadillac XT4 | Unknown Or Other | 9 | — |
| 2024 Cadillac XT5 | Unknown Or Other | 8 | — |
| 2023 Cadillac XT6 | Unknown Or Other | 8 | — |
| 2022 Cadillac XT6 | Unknown Or Other | 8 | — |
| 2021 Cadillac XT6 | Unknown Or Other | 8 | — |
| 2020 Cadillac XT6 | Unknown Or Other | 8 | — |
| 2024 Chevrolet Blazer | Unknown Or Other | 8 | — |
| 2024 Buick Envision | Unknown Or Other | 7 | — |
| 2024 Cadillac CT4 | Unknown Or Other | 7 | — |
| 2024 Cadillac CT5 | Unknown Or Other | 7 | — |
| 2024 Cadillac XT4 | Unknown Or Other | 7 | — |
| 2025 Cadillac XT5 | Unknown Or Other | 7 | — |
| 2025 Chevrolet Blazer | Unknown Or Other | 7 | — |
| 2025 Buick Envision | Unknown Or Other | 6 | — |
| 2025 Cadillac CT4 | Unknown Or Other | 6 | — |
| 2025 Cadillac CT5 | Unknown Or Other | 6 | — |
| 2025 Cadillac XT4 | Unknown Or Other | 6 | — |
| 2024 Cadillac XT6 | Unknown Or Other | 6 | — |
| 2025 Chevrolet Equinox | Unknown Or Other | 3 | 3 |
| 2025 Cadillac XT6 | Unknown Or Other | 5 | — |
| 2024 GMC Acadia | Power Train | 3 | — |
| 2025 GMC Terrain | Unknown Or Other | 3 | — |
| 2026 Chevrolet Equinox | Unknown Or Other | 1 | — |
| 2026 GMC Terrain | 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
What owners said
Source: NHTSA complaint databaseOwners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.
The engine code is P04FB and is commonly found as an issue when you do a search
The contact stated while driving at an undisclosed speed, the check engine warning light illuminated and DTC: P04FB; was displayed
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P04FB. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- PIP5841G2026-01-10 · Unknown Or Other
- This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
- PIP5841G2025-12-17 · Unknown Or Other
- This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
- PIP6059B2025-10-17 · Unknown Or Other
- This Preliminary Information communicates a potential MIL / SES due to P04FB that Engineering is currently working on a design improvement.
- PIP6059A2025-05-12 · Unknown Or Other
- This Preliminary Information communicates a potential MIL / SES due to P04FB that Engineering is currently working on a design improvement.
- PIP60592025-04-18 · Unknown Or Other
- This Preliminary Information communicates a potential MIL / SES due to P04FB that Engineering is currently working on a design improvement.
- PIP5841F2025-04-16 · Unknown Or Other
- This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
What P04FB means
Source: SAE J2012 / OBD-IIP04FB 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 P04FB
Source: NHTSA files and the OBD-II standardCan I keep driving with P04FB 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.