Home08-394-25 REV. A · ALFA ROMEO, CHRYSLER, DODGE, JEEP, RAM
ALFA ROMEO, CHRYSLER, DODGE, JEEP, RAM

08-394-25 REV. A

Manufacturer communications

Publication date
2025-12-12
Received by NHTSA
2025-12-17
NHTSA record numbers
11026677

Manufacturer summary

Original wording in English

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.

NHTSA manufacturer communications ↗

Reported code forms

B1E21

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

Check vehicle applicability

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

MakeModelModel year
Ram45002023
Ram45002022
Ram55002026
Ram55002025
Ram55002024
Ram55002023
Ram55002022
RamPROMASTER2026
RamPROMASTER2025
RamPROMASTER2024
RamPROMASTER2023
RamPROMASTER CITY2022

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