B1E21 on Chrysler vehicles
B1E21 is named on 10 Chrysler model years (2022–2026): 28 manufacturer filings and 0 owner reports in NHTSA’s files, across Pacifica, Voyager.
Which Chrysler model years name B1E21
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2025 Chrysler Pacifica | Electrical System | 4 | — |
| 2024 Chrysler Pacifica | Electrical System | 4 | — |
| 2023 Chrysler Pacifica | Electrical System | 4 | — |
| 2022 Chrysler Pacifica | Electrical System | 4 | — |
| 2026 Chrysler Pacifica | Electrical System | 3 | — |
| 2025 Chrysler Voyager | Electrical System | 2 | — |
| 2024 Chrysler Voyager | Electrical System | 2 | — |
| 2023 Chrysler Voyager | Electrical System | 2 | — |
| 2022 Chrysler Voyager | Electrical System | 2 | — |
| 2026 Chrysler Voyager | Electrical System | 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.
Chrysler filings that name B1E21
Source: NHTSA manufacturer communicationsBulletins and campaigns Chrysler filed with NHTSA whose summary names B1E21. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 08-394-25 Service bulletin2025-12-05 · Electrical System
- Telematics Box Module (TBM) Backup Battery Replacement When DTC B1E21 Is Present echnicians may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● B1E21-96 - Backup Battery Component Internal Failure
- 08-394-25 REV. A Service bulletin2025-12-12 · Electrical System
- Telematics Box Module (TBM) Backup Battery Replacement When DTC B1E21 Is Present Technicians may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● B1E21-96 - Backup Battery Component Internal Failure.
What B1E21 means
Source: SAE J2012 / OBD-IIB1E21 is a manufacturer-specific code: the second character is a 1, 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 Chrysler 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 B1E21 a known problem on Chrysler vehicles?
It is a documented one: NHTSA's files hold 28 manufacturer filings and 0 owner reports naming B1E21 on 10 Chrysler model years (2022–2026). 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 Chrysler models does B1E21 appear on most?
2025 Pacifica (4 documents), 2024 Pacifica (4 documents), 2023 Pacifica (4 documents).
Does B1E21 on a Chrysler 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.