B0021 on Cadillac vehicles
B0021 is named on 5 Cadillac model years (2019–2023): 5 manufacturer filings and 0 owner reports in NHTSA’s files, across XT4.
Which Cadillac model years name B0021
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2023 Cadillac XT4 | Electrical System | 1 | — |
| 2022 Cadillac XT4 | Air Bags | 1 | — |
| 2021 Cadillac XT4 | Seats | 1 | — |
| 2020 Cadillac XT4 | Air Bags | 1 | — |
| 2019 Cadillac XT4 | Seats | 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.
Cadillac filings that name B0021
Source: NHTSA manufacturer communicationsBulletins and campaigns Cadillac filed with NHTSA whose summary names B0021. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 23-NA-110 Service bulletin2024-02-27 · Electrical System
- This technical bulletin provides a procedure to correct the condition of Intermittent Service Airbag System message (DTC B0014 B0021).
What B0021 means
Source: SAE J2012 / OBD-IIB0021 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 B0021 a known problem on Cadillac vehicles?
It is a documented one: NHTSA's files hold 5 manufacturer filings and 0 owner reports naming B0021 on 5 Cadillac model years (2019–2023). 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 B0021 appear on most?
2023 XT4 (1 document), 2022 XT4 (1 document), 2021 XT4 (1 document).
Does B0021 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.