DTC B2A16 (15-251-19R)

WARNING: This page is about the Outback Limited XT, which is a different variant/trim than selected.

Publication date: 2025-06-09
Reference number: 15-251-19R
Supersedes refnos: 15-251-19

DTC B2A16

TECHNICAL SERVICE BULLETIN

Reference Number(s): 15-251-19R, Date of Issue: June 09, 2025

SUBARU:

All Models

APPLICABILITY

All Models with Gen 2 & Gen 3 Telematics Except Solterra

INTRODUCTION

This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16. In most cases involving this DTC, the following scenario(s) occur:

When trying to use the remote engine starter (RES) feature through Telematics (STARLINK/My Subaru app) the request is unsuccessful and the red Telematics indicator lamp illuminates.
The customer takes their vehicle to the Retailer and the Technician finds the only code stored to be B2A16 in the DCM.
The Technician diagnoses the DTC per the applicable Service Manual trouble tree and replaced the DCM.

IMPORTANT: Nearly all of the scenarios outlined above can be addressed and normal RES operation through the Telematics system restored WITHOUT replacement of the DCM. SBR will be updating the applicable Service Manuals to reflect this very soon. In the interim, refer to the diagnostic procedure outlined in this bulletin.

GENERATION INFORMATION

SERVICE PROCEDURE/INFORMATION

REMINDER: Customer satisfaction and retention starts with performing quality repairs.

If DTC B2A16 is found in the DCM, start by registering the DCM with the vehicle immobilizer system to avoid a potentially unnecessary DCM replacement. Follow the instructions found below:

Register the DCM with the immobilizer as outlined in TSB 15-251-19R or 15-226-25 .
Cycle the ignition key off and wait 1 minute.
Connect the SSM4 and clear all Diagnostic Trouble Codes (DTCs).
Cycle the ignition off and wait 1 minute.
On a Gen3-equipped model, connect the SSM4 and review the telematics data for all PIDs, verifying that the Immobilizer Key Registration Status equals "Registered."
Follow TSB 15-266-20R TELEMATICS FUNCTION AND OPERATION TESTING INFORMATION to request RES verification of the repair.

NOTE: When selecting G, H, or I Type, the latest SSM4 software (July 2019 version or later) is required along with a secure network connection. Refer to TSB 15-246-19 NEW IMMOBILIZER REGISTRATION PROCEDURES for additional details.

Once the DTC is cleared, confirm the Telematics RES function operates.

NOTE: The customer will need to help with this as it requires them to enter their PIN through either the MySubaru web page or the mobile MySubaru App.

If registering the DCM with the vehicle immobilizer system resolves the condition and STARLINK Telematics RES now operates normally, ensure all DTC are clear and release the vehicle.

IMPORTANT: Whenever either the Keyless Access Module (KAM) or the DCM is replaced on a STARLINK Gen2 and Gen 3 Telematics - equipped vehicle, the DCM MUST be registered with the vehicle immobilizer system.

Always refer to the applicable Immobilizer Registration Manual for the Model Year vehicle being repaired. These manuals can be found on STIS by searching Online Publications > Publication Type > Other/Miscellaneous and searching with the keyword "Immobilizer".

WARRANTY/CLAIM INFORMATION

For vehicles within the Basic New Car Limited Warranty period, this repair may be submitted using the following claim information:

Labor Description	Labor Operation #	Labor Time	Fail Code
DCM IMMOBILIZER REGISTRATION & RES SYSTEM OPERATION CHECK	A067-918	0.4	ZTT-43

IMPORTANT REMINDERS:

SOA strongly discourages the printing and/or local storage of service information as previously released information and electronic publications may be updated at any time.
Always check for any open recalls or campaigns anytime a vehicle is in for servicing.
Always refer to STIS for the latest service information before performing any repairs.