B2A16
0 owner reports and 607 manufacturer filings across 85 model years from Subaru.
Where B2A16 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2020 Subaru Crosstrek | Electrical System | 17 | — |
| 2019 Subaru Crosstrek | Electrical System | 17 | — |
| 2021 Subaru Crosstrek | Electrical System | 15 | — |
| 2016 Subaru Crosstrek | Electrical System | 15 | — |
| 2022 Subaru Crosstrek | Electrical System | 13 | — |
| 2023 Subaru Crosstrek | Electrical System | 12 | — |
| 2020 Subaru Ascent | Electrical System | 11 | — |
| 2019 Subaru Ascent | Electrical System | 11 | — |
| 2020 Subaru Forester | Electrical System | 11 | — |
| 2019 Subaru Forester | Electrical System | 11 | — |
| 2020 Subaru Impreza | Electrical System | 11 | — |
| 2019 Subaru Impreza | Electrical System | 11 | — |
| 2020 Subaru Legacy | Electrical System | 11 | — |
| 2020 Subaru Outback | Electrical System | 11 | — |
| 2018 Subaru Crosstrek | Electrical System | 10 | — |
| 2017 Subaru Crosstrek | Electrical System | 10 | — |
| 2017 Subaru Legacy/Outback | Electrical System | 10 | — |
| 2016 Subaru Legacy/Outback | Electrical System | 10 | — |
| 2023 Subaru WRX | Electrical System | 10 | — |
| 2022 Subaru WRX | Electrical System | 10 | — |
| 2021 Subaru WRX | Electrical System | 10 | — |
| 2020 Subaru WRX | Electrical System | 10 | — |
| 2019 Subaru WRX | Electrical System | 10 | — |
| 2018 Subaru WRX | Electrical System | 10 | — |
| 2017 Subaru WRX | Electrical System | 10 | — |
| 2016 Subaru WRX | Electrical System | 10 | — |
| 2022 Subaru Ascent | Electrical System | 9 | — |
| 2021 Subaru Ascent | Electrical System | 9 | — |
| 2021 Subaru Forester | Electrical System | 9 | — |
| 2022 Subaru Impreza | Electrical System | 9 | — |
| 2021 Subaru Impreza | Electrical System | 9 | — |
| 2022 Subaru Legacy | Electrical System | 9 | — |
| 2021 Subaru Legacy | Electrical System | 9 | — |
| 2022 Subaru Outback | Electrical System | 9 | — |
| 2021 Subaru Outback | Electrical System | 9 | — |
| 2024 Subaru Crosstrek | Electrical System | 8 | — |
| 2022 Subaru Forester | Electrical System | 8 | — |
| 2024 Subaru Impreza | Electrical System | 8 | — |
| 2023 Subaru Ascent | Electrical System | 7 | — |
| 2025 Subaru Forester | Electrical System | 7 | — |
| 2023 Subaru Forester | Electrical System | 7 | — |
| 2023 Subaru Impreza | Electrical System | 7 | — |
| 2023 Subaru Legacy | Electrical System | 7 | — |
| 2023 Subaru Outback | Electrical System | 7 | — |
| 2024 Subaru Ascent | Electrical System | 6 | — |
| 2024 Subaru Forester | Electrical System | 6 | — |
| 2024 Subaru Legacy | Electrical System | 6 | — |
| 2024 Subaru Outback | Electrical System | 6 | — |
| 2024 Subaru BRZ | Electrical System | 5 | — |
| 2023 Subaru BRZ | Electrical System | 5 | — |
| 2022 Subaru BRZ | Electrical System | 5 | — |
| 2020 Subaru BRZ | Electrical System | 5 | — |
| 2019 Subaru BRZ | Electrical System | 5 | — |
| 2018 Subaru BRZ | Electrical System | 5 | — |
| 2017 Subaru BRZ | Electrical System | 5 | — |
| 2016 Subaru BRZ | Electrical System | 5 | — |
| 2018 Subaru Forester | Electrical System | 5 | — |
| 2017 Subaru Forester | Electrical System | 5 | — |
| 2016 Subaru Forester | Electrical System | 5 | — |
| 2025 Subaru Impreza | Electrical System | 5 | — |
Showing the 60 model years where B2A16 appears most; it is on file for 85 in total.
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
What it gets filed under
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names B2A16. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- 18-226-25R2025-12-08 · Engine
- This Service Information Bulletin provides the Service Manual Correction to the diagnostic procedure for DTC B2A16 (Immobilizer Key Collation Diagnosis).
- 15-251-19R2025-06-24 · Electrical System
- This Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
- 15-251-19R2025-04-30 · Electrical System
- This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
- 18-226-252025-02-12 · Electrical System
- This Bulletin provides the Service Manual Correction to the diagnostic procedure for DTC B2A16 (Immobilizer Key Collation Diagnosis).
- 15-251-19R2025-02-10 · Electrical System
- "This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16."
- 15-251-19R2024-08-05 · Electrical System
- This Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
What B2A16 means
Source: SAE J2012 / OBD-IIB2A16 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. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about B2A16
Source: NHTSA files and the OBD-II standardCan I keep driving with B2A16 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.