P3055 on Cadillac vehicles
P3055 is named on 11 Cadillac model years (2018–2021): 22 manufacturer filings and 0 owner reports in NHTSA’s files, across CT6, XT4, XT5, XT6.
Which Cadillac model years name P3055
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2021 Cadillac XT4 | Engine | 2 | — |
| 2021 Cadillac XT5 | Engine | 2 | — |
| 2021 Cadillac XT6 | Engine | 2 | — |
| 2020 Cadillac XT4 | Electrical System | 2 | — |
| 2020 Cadillac XT5 | Electrical System | 2 | — |
| 2020 Cadillac XT6 | Electrical System | 2 | — |
| 2019 Cadillac CT6 | Electrical System | 2 | — |
| 2019 Cadillac XT4 | Engine | 2 | — |
| 2019 Cadillac XT5 | Electrical System | 2 | — |
| 2018 Cadillac CT6 | Engine | 2 | — |
| 2018 Cadillac XT5 | Engine | 2 | — |
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.
Cadillac filings that name P3055
Source: NHTSA manufacturer communicationsBulletins and campaigns Cadillac filed with NHTSA whose summary names P3055. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 21NA139 Service bulletin2021-06-21 · Electrical System
- This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set.
- 21-NA-139 Service bulletin2025-04-02 · Engine
- This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set.
What P3055 means
Source: SAE J2012 / OBD-IIP3055 is a manufacturer-specific code: the second character is a 3, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
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 P3055 a known problem on Cadillac vehicles?
It is a documented one: NHTSA's files hold 22 manufacturer filings and 0 owner reports naming P3055 on 11 Cadillac model years (2018–2021). 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 P3055 appear on most?
2019 CT6 (2 documents), 2018 CT6 (2 documents), 2021 XT4 (2 documents).
Does P3055 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.