P0604 on Buick vehicles
P0604 is named on 6 Buick model years (2023–2026): 10 manufacturer filings and 0 owner reports in NHTSA’s files, across Enclave, Envision.
Which Buick model years name P0604
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2025 Buick Enclave | Not specified | 2 | — |
| 2025 Buick Envision | Not specified | 2 | — |
| 2024 Buick Envision | Not specified | 2 | — |
| 2023 Buick Envision | Not specified | 2 | — |
| 2026 Buick Enclave | Not specified | 1 | — |
| 2026 Buick Envision | Not specified | 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.
Buick filings that name P0604
Source: NHTSA manufacturer communicationsBulletins and campaigns Buick filed with NHTSA whose summary names P0604. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- PIT6512 Service bulletin2026-05-11 · Unknown Or Other
- This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and reset the SDGM. Advises of how to contact PQC to authorize SDGM replacement.
- PIT6512A Service bulletin2026-08-03 · Unknown Or Other
- This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and reset the SDGM. Advises of how to contact PQC to authorize SDGM replacement.
What P0604 means
Source: SAE J2012 / OBD-IIP0604 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 Buick 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 P0604 a known problem on Buick vehicles?
It is a documented one: NHTSA's files hold 10 manufacturer filings and 0 owner reports naming P0604 on 6 Buick model years (2023–2026). 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 Buick models does P0604 appear on most?
2025 Enclave (2 documents), 2025 Envision (2 documents), 2024 Envision (2 documents).
Does P0604 on a Buick 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.