Diagnostic trouble code · Buick
P0234 on Buick vehicles The turbocharger or supercharger is making more boost than the computer asked for
P0234 is named on 10 Buick model years (2016–2025): 97 manufacturer filings and 0 owner reports in NHTSA’s files, across Encore, Envista.
Powertrain 10 model years 97 manufacturer filings
Which Buick model years name P0234
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2018 Buick Encore | Engine | 16 | — |
| 2017 Buick Encore | Engine | 16 | — |
| 2016 Buick Encore | Engine | 16 | — |
| 2020 Buick Encore | Engine | 13 | — |
| 2019 Buick Encore | Engine | 11 | — |
| 2022 Buick Encore | Engine | 9 | — |
| 2021 Buick Encore | Engine | 9 | — |
| 2023 Buick Encore | Engine | 4 | — |
| 2025 Buick Envista | Not specified | 2 | — |
| 2024 Buick Envista | 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.
Engine 64 Equipment 11 Exterior Lighting 11 Power Train 3
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Buick filings that name P0234
Source: NHTSA manufacturer communicationsBulletins and campaigns Buick filed with NHTSA whose summary names P0234. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- PIP5495A Service bulletin2017-06-08 · Equipment — Other — Owners/Service/Other Manual
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
- PIP5495B Service bulletin2017-06-14 · Equipment — Other — Owners/Service/Other Manual
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
- PIP5495C Service bulletin2017-10-20 · Equipment — Electrical
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
- PIP5495L Service bulletin2020-02-07 · Equipment Adaptive/Mobility
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
- PIP5495M Service bulletin2020-06-10 · Engine And Engine Cooling — Engine — Gasoline — Turbo/Supercharger
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
- PIP5495M Service bulletin2021-03-19 · Exterior Lighting
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
- PIP5495G Service bulletin2018-10-17 · Engine And Engine Cooling
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
- PIP5495H Service bulletin2018-11-14 · Engine
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
- PIP5495J Service bulletin2019-05-06 · Engine
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
- 21NA293 Service bulletin2022-01-13 · Engine And Engine Cooling
- This technical bulletin provides repair information to correct a customer concern of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler Icing - Malfunction Indicator Lamp (MIL) Illuminated, DTC P0299, P0234, P0236, P00C7 Set.
- PIP5892 Service bulletin2022-12-01 · Engine And Engine Cooling
- This Preliminary Information communication provides information to the dealer technician related to a Malfunction Indicator Lamp coming on post turbocharger replacement with P0234 (Engine Overboost) set current or in history. It advises the technician to clear the DTC, Use GDS2 to perform the Intake System Learned Values Reset. To advise the customer that GM is aware of this concern and will prov
- PIP5892A Service bulletin2022-12-07 · Engine And Engine Cooling
- This Preliminary Information communication provides information to the dealer technician related to a Malfunction Indicator Lamp coming on post turbocharger replacement with P0234 (Engine Overboost) set current or in history. It advises the technician to clear the DTC, Use GDS2 to perform the Intake System Learned Values Reset. To advise the customer that GM is aware of this concern and will prov
What P0234 means
Source: SAE J2012 / OBD-IIThe turbocharger or supercharger is making more boost than the computer asked for.
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.
From here
Common questions
Source: NHTSA files and the OBD-II standardIs P0234 a known problem on Buick vehicles?
It is a documented one: NHTSA's files hold 97 manufacturer filings and 0 owner reports naming P0234 on 10 Buick model years (2016–2025). 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 P0234 appear on most?
2018 Encore (16 documents), 2017 Encore (16 documents), 2016 Encore (16 documents).
Does P0234 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.