C056D on Buick vehicles
C056D is named on 10 Buick model years (2016–2022): 39 manufacturer filings and 0 owner reports in NHTSA’s files, across Enclave, Envision, LaCrosse, Regal.
Which Buick model years name C056D
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2019 Buick Enclave | Parking Brake | 8 | — |
| 2018 Buick Enclave | Parking Brake | 8 | — |
| 2022 Buick Enclave | Electrical System | 5 | — |
| 2021 Buick Enclave | Parking Brake | 5 | — |
| 2020 Buick Enclave | Parking Brake | 5 | — |
| 2022 Buick Envision | Electrical System | 2 | — |
| 2021 Buick Envision | Electrical System | 2 | — |
| 2020 Buick Envision | Power Train | 2 | — |
| 2017 Buick Regal | Steering | 1 | — |
| 2016 Buick LaCrosse | Steering | 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 C056D
Source: NHTSA manufacturer communicationsBulletins and campaigns Buick filed with NHTSA whose summary names C056D. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- PIT5662A Service bulletin2019-04-25 · Electrical System
- This Preliminary information communicates information to diagnose DTC C056D or C056E.
- PIT5662B Service bulletin2019-05-03 · Parking Brake
- This Preliminary information communicates information to diagnose DTC C056D or C056E.
- PIT5662C Service bulletin2019-07-19 · Equipment
- This Preliminary information communicates information to diagnose DTC C056D or C056E.
- PIT5662F Service bulletin2021-08-19 · Electrical System — Adas — Parking Assist — Warning
- This Preliminary information communicates information to diagnose DTC C056D or C056E.
- PIT5662G Service bulletin2022-03-25 · Parking Brake
- This Preliminary information communicates information to diagnose DTC C056D or C056E.
- 22-NA-107 Service bulletin2022-05-20 · Electrical System
- This service bulletin provides repair information to correct a customer concern of a Service AWD Message in DIC at Ignition On with DTC C056D Set.
- 22-NA-107 Service bulletin2022-07-21 · Power Train
- This service bulletin provides repair information to correct a customer concern of a Service AWD Message in DIC at Ignition On with DTC C056D Set.
- 19NA182 Service bulletin2019-08-09 · Steering
- This technical bulletin provides repair information to correct a customer concern of "Steering Assist Is Reduced" Message and One of The Following DTCs Are Set: C056D, U0415.
What C056D means
Source: SAE J2012 / OBD-IIC056D 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 C056D a known problem on Buick vehicles?
It is a documented one: NHTSA's files hold 39 manufacturer filings and 0 owner reports naming C056D on 10 Buick model years (2016–2022). 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 C056D appear on most?
2019 Enclave (8 documents), 2018 Enclave (8 documents), 2022 Enclave (5 documents).
Does C056D 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.