What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
B1E21-96Backup Battery Component Internal FailureB1E21-96Backup Battery Component Internal FailureB1E21-96Backup Battery Component Internal FailureB1E21-96Backup Battery Component Internal FailureView all · Manufacturer wording →
Manufacturer communications
7Original wording in English
JEEP, RAM
Reported code forms B1E21
TBM2.0H Setting U0080-00. Do not replace TBM ECU or SGW. If replacement is determined, Verify "Z" part number availability. Order a "Z" part number for all Exchange Orders, Warranty, Mopar, Customer Pay and Service…
JEEP, RAM
Reported code forms B1E21
TBM2.0H Setting U0080-00. Do not replace TBM ECU or SGW. Under certain conditions, SGW Module may take longer to establish Ethernet communication after boot up. If it takes longer than 30 seconds, The TBM2.0H module…
ALFA ROMEO, CHRYSLER, DODGE, JEEP, RAM
Reported code forms B1E21 B1E21-96
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…
ALFA ROMEO, CHRYSLER, DODGE, JEEP, RAM
Reported code forms B1E21-96
If the DTC B1E21-96: Backup Battery-Component Internal Failure is active and customer states Popup message will show at the radio: "Battery of Uconnect Box requires service. SOS call and related functions may be…
ALFA ROMEO, CHRYSLER, DODGE, JEEP, RAM
Reported code forms B1E21 B1E21-96
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…
JEEP
Reported code forms B1E21
DTC B1E21 is triggered when the TBM Backup Battery is discharged, inactive, or drained. This can happen during the lifetime of the vehicle. TBM should not be replace for B1E21, since there is no fault on TBM. TBM…
Check vehicle applicability
137A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Alfa Romeo | GIULIA | 2026 |
| Alfa Romeo | GIULIA | 2025 |
| Alfa Romeo | GIULIA | 2024 |
| Alfa Romeo | GIULIA | 2023 |
| Alfa Romeo | GIULIA | 2022 |
| Alfa Romeo | GIULIA | 2021 |
| Alfa Romeo | GIULIA | 2020 |
| Alfa Romeo | GIULIA | 2019 |
| Alfa Romeo | STELVIO | 2026 |
| Alfa Romeo | STELVIO | 2025 |
| Alfa Romeo | STELVIO | 2024 |
| Alfa Romeo | STELVIO | 2023 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.