P0451 on Buick vehicles
P0451 is named on 5 Buick model years (2020–2024): 8 manufacturer filings and 0 owner reports in NHTSA’s files, across Envision.
Which Buick model years name P0451
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2021 Buick Envision | Engine | 3 | — |
| 2022 Buick Envision | Electrical System | 2 | — |
| 2024 Buick Envision | Engine | 1 | — |
| 2023 Buick Envision | Fuel/Propulsion System | 1 | — |
| 2020 Buick Envision | Engine | 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 P0451
Source: NHTSA manufacturer communicationsBulletins and campaigns Buick filed with NHTSA whose summary names P0451. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- PIE0613B Service bulletin2021-05-25 · Engine
- This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Check Engine Lamp illuminated on the Driver Information Center (DIC) and/or poor fuel fill, DTC P0451 Set.
- 22-NA-203 Service bulletin2022-10-17 · Electrical System
- This technical bulletin provides a procedure to correct the condition of Check Engine Lamp Illuminated on Driver Information Center (DIC) with DTC P0451 Set.
- 22-NA-203 Service bulletin2024-04-17 · Engine And Engine Cooling
- This technical bulletin provides a procedure to correct the condition of Check Engine Lamp Illuminated on Driver Information Center (DIC) with DTC P0451 Set.
What P0451 means
Source: SAE J2012 / OBD-IIP0451 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 P0451 a known problem on Buick vehicles?
It is a documented one: NHTSA's files hold 8 manufacturer filings and 0 owner reports naming P0451 on 5 Buick model years (2020–2024). 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 P0451 appear on most?
2021 Envision (3 documents), 2022 Envision (2 documents), 2024 Envision (1 document).
Does P0451 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.