C056E on Cadillac vehicles
C056E is named on 9 Cadillac model years (2017–2022): 42 manufacturer filings and 1 owner report in NHTSA’s files, across XT5, XT6.
Which Cadillac model years name C056E
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2018 Cadillac XT5 | Parking Brake | 8 | 1 |
| 2019 Cadillac XT5 | Parking Brake | 8 | — |
| 2017 Cadillac XT5 | Parking Brake | 8 | — |
| 2022 Cadillac XT5 | Parking Brake | 3 | — |
| 2022 Cadillac XT6 | Parking Brake | 3 | — |
| 2021 Cadillac XT5 | Parking Brake | 3 | — |
| 2021 Cadillac XT6 | Parking Brake | 3 | — |
| 2020 Cadillac XT5 | Parking Brake | 3 | — |
| 2020 Cadillac XT6 | Electrical System | 3 | — |
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.
What Cadillac owners said
Source: NHTSA complaint databaseOwners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.
The the car displays a break light in the display and the fault code C056E is now constantly present in the computer
Cadillac filings that name C056E
Source: NHTSA manufacturer communicationsBulletins and campaigns Cadillac filed with NHTSA whose summary names C056E. 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 · Parking Brake
- 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.
- PIT5662G Service bulletin2022-11-18 · Equipment — Other — Owners/Service/Other Manual
- This Preliminary information communicates information to diagnose DTC C056D or C056E.
What C056E means
Source: SAE J2012 / OBD-IIC056E 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 Cadillac 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 C056E a known problem on Cadillac vehicles?
It is a documented one: NHTSA's files hold 42 manufacturer filings and 1 owner report naming C056E on 9 Cadillac model years (2017–2022). 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 Cadillac models does C056E appear on most?
2018 XT5 (9 documents), 2019 XT5 (8 documents), 2017 XT5 (8 documents).
Does C056E on a Cadillac 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.