P0172 on Buick vehicles The engine is running rich on bank 1: too much fuel for the air going in
P0172 is named on 10 Buick model years (2016–2020): 12 manufacturer filings and 0 owner reports in NHTSA’s files, across Regal, Envision, Verano.
Which Buick model years name P0172
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2017 Buick Regal | Engine | 2 | — |
| 2016 Buick Regal | Engine | 2 | — |
| 2020 Buick Envision | Equipment | 1 | — |
| 2020 Buick Regal | Electrical System | 1 | — |
| 2019 Buick Envision | Electrical System | 1 | — |
| 2019 Buick Regal | Engine | 1 | — |
| 2018 Buick Envision | Engine | 1 | — |
| 2018 Buick Regal | Engine | 1 | — |
| 2017 Buick Verano | Not specified | 1 | — |
| 2016 Buick Verano | 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 P0172
Source: NHTSA manufacturer communicationsBulletins and campaigns Buick filed with NHTSA whose summary names P0172. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 18-NA-246 Service bulletin2022-03-11 · Engine And Engine Cooling
- This service bulletin provides repair procedures, depending on model year, to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated with DTC P0172, P06DE and/or P0521 Set.
- PIP6113 Service bulletin2026-05-19 · Unknown Or Other
- This document provides the technician with a diagnostic tip if the vehicle stalls and set diagnostic trouble code P0191 and may also set P0172. The diagnostic tip has the technician inspect the high pressure fuel pump body markings to confirm it is an original manufacture part. If it is not an original manufacture part, they should install one and evaluate the vehicle.
- 22-NA-056 Service bulletin2022-03-11 · Equipment
- This service bulletin provides a repair procedure to correct a customer concern of a MIL Illuminated with DTC P0172, P06DE and/or P0521 Set.
What P0172 means
Source: SAE J2012 / OBD-IIThe engine is running rich on bank 1: too much fuel for the air going in.
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 P0172 a known problem on Buick vehicles?
It is a documented one: NHTSA's files hold 12 manufacturer filings and 0 owner reports naming P0172 on 10 Buick model years (2016–2020). 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 P0172 appear on most?
2017 Regal (2 documents), 2016 Regal (2 documents), 2020 Envision (1 document).
Does P0172 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.