2021-2026 Stellantis KeyFOB Low Battery DTCs B1A10-00

Symptoms

Owners of 2021-2026 Stellantis vehicles, including models like the Chrysler Pacifica, Jeep Wrangler, Dodge Durango, and RAM trucks, may encounter problems with their Remote Keyless Entry (RKE), passive entry, or passive start systems. These crucial functions might become inoperable entirely or exhibit intermittent behavior, making it difficult to lock, unlock, or start the vehicle. A direct indication of this underlying issue is often a warning displayed in the instrument cluster, specifically stating "KeyFOB low battery". This warning serves as a primary alert to the driver that the KeyFOB's power source is depleting, which can lead to the KeyFOB low battery condition. For instance, a Jeep Wrangler KeyFOB low battery can lead to difficulty unlocking doors or starting the vehicle.

Fault Codes / DTCs

When these symptoms occur, a diagnostic scan may reveal specific Diagnostic Trouble Codes (DTCs) stored in the Radio Frequency Hub (RFH) module. These codes indicate a low battery condition in one of the vehicle's KeyFOBs. The following DTCs are associated with this issue:

Diagnosis / Trigger Conditions

The presence of an 'Active' status for any of the DTCs from B1A10-00 to B1A17-00 indicates that the corresponding KeyFOB has a low battery. The Radio Frequency Hub (RFH) monitors the battery status of each registered KeyFOB. When a KeyFOB's battery voltage drops below a certain threshold, the RFH logs the specific DTC for that fob. This condition can lead to the observed issues with remote keyless entry, passive entry, or passive start functions.

Important Warning for Owners

Stellantis Technical Service Bulletin S2608000010 explicitly states a critical piece of information for both technicians and owners: The Radio Frequency Hub (RFH) or the KeyFOBs themselves DO NOT need to be replaced. If these DTCs are found to be 'Active', the only required action is to replace the battery within the specific KeyFOB that is setting the fault. This warning prevents unnecessary and costly replacements of functional components.

Repair Procedure Summary

To resolve the 'KeyFOB low battery' condition indicated by DTCs B1A10-00 through B1A17-00, the repair procedure is straightforward. Technicians should identify which specific KeyFOB (from 1 to 8) is triggering the active fault code. Once identified, the battery within that particular KeyFOB must be replaced. No further diagnosis or replacement of the entire KeyFOB or the vehicle's Radio Frequency Hub (RFH) is necessary. This simple battery replacement addresses the root cause of the KeyFOB low battery issue and restores full functionality to the remote keyless entry and passive start systems.

Owner Action

If you are experiencing issues with your remote keyless entry, passive entry, or passive start, or if you see a "KeyFOB low battery" warning in your instrument cluster, it is recommended to have your vehicle diagnosed. If the diagnosis confirms active DTCs from B1A10-00 to B1A17-00, the solution is to replace the battery in the affected KeyFOB. This is generally a simple and inexpensive repair that can often be performed by the owner or a local service center. This communication from Stellantis, Case Number S2608000010, does not authorize warranty repairs, meaning the cost of the battery replacement will typically be the owner's responsibility. This applies to a Jeep Wrangler KeyFOB low battery as well as other affected models.

NHTSA ID: 11030042