ATTENTION:
GENERAL MANAGER

q

PARTS MANAGER

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CLAIMS PERSONNEL

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IMPORTANT - All
Service Personnel
Should Read and
Initial in the boxes
provided, right.

SERVICE MANAGER

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© 2025 Subaru of America, Inc. All rights reserved.

SERVICE BULLETIN
APPLICABILITY:

SUBJECT:

2025MY Impreza & Crosstrek
2025MY Forester

NUMBER:
DATE:

16-153-25
06/23/25

DTC P0A12 / Reprogramming Files

INTRODUCTION:
This bulletin announces the availability of reprogramming files for the Transmission Control Module
(TCM). These files contain enhanced logic to prevent DTC P0A12 from being set unnecessarily
in the TCM memory. If DTC P0A12 is found in the TCM memory, follow the procedures outlined
below.
PRODUCTION CHANGE INFORMATION:
APPLICABLE VEHICLE

STARTING VIN

FORESTER

SH505292

IMPREZA & CROSSTREK

S8253370

PFC FILE INFROMATION:
MY

Model

Forester

Impreza
25

Crosstrek

Specification

File Description

Old Part Number

NEW CID

30919AK242.PFC

30919AK240
30919AK241

3A12246572L

30919AK252.PFC

30919AK250
30919AK251

3A12346572L

2.0L NA CVT
without Paddle shift

30919AK521.PFC

30919AK520

4111046370L

2.0L NA CVT
with Paddle shift

30919AK531.PFC

30919AK530

4111146370L

2.5L NA CVT
with Paddle shift

30919AK541.PFC

30919AK540

4112146370L

2.0L NA CVT
without Paddle shift

30919AK551.PFC

30919AK550

4111246370L

2.0L NA CVT
with Paddle shift

30919AK561.PFC

30919AK560

4111346370L

2.5L NA CVT
with Paddle shift

30919AK571.PFC

30919AK570

4112346370L

2.5L NA CVT

CAUTION: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS COULD
RESULT IN SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS.
Subaru Service Bulletins are intended for use by professional technicians ONLY. They
are written to inform those technicians of conditions that may occur in some vehicles,
or to provide information that could assist in the proper servicing of the vehicle. Properly
trained technicians have the equipment, tools, safety instructions, and know-how to
do the job correctly and safely. If a condition is described, DO NOT assume that this
Service Bulletin applies to your vehicle, or that your vehicle will have that condition.

Subaru of America, Inc. is
ISO 14001 Compliant
ISO 14001 is the international standard for
excellence in Environmental Management
Systems. Please recycle or dispose of
automotive products in a manner that is friendly
to our environment and in accordance with all
local, state and federal laws and regulations.

Continued...
Bulletin Number: 16-153-25; Date: 06/23/25

Page 1 of 3

SERVICE PROCEDURE / INFORMATION:
REMINDER: Customer satisfaction and retention starts with performing quality repairs.
•
•

Reprogram the TCM Control Module following the normal SSM5-R procedure.
Detailed information regarding the SSM5-R reprograming procedures can be found in TSB 1428-21R.

REMINDER: Customer satisfaction and retention starts with performing quality repairs.
Subaru of America, Inc. (SOA) highly recommends utilizing either the Subaru Midtronics DCA8000 Dynamic Diagnostic Charging System or the Subaru Midtronics GR8-1100 Diagnostic Battery
Charger to the vehicle and utilizing the Power Supply Mode feature anytime a vehicle control module
is being reprogrammed. Once the Midtronics charger is connected to the vehicle, if the battery is fully
charged, it takes less than three (3) minutes to boot-up the charger, select the Power Supply Mode,
and have the battery voltage stabilized and ready for reprogramming.
NOTES:
•

For instructions on using the Power Supply Mode, reference the applicable User Manual for
theMidtronics DCA-8000 Dynamic Diagnostic Charging System and the Midtronics GR8-1100
Diagnostic Battery Charger on STIS

•

Confirm all electrical loads such as lights, audio, HVAC, seat heaters, and rear defroster are all
switched OFF before setting up the charger for Power Supply Mode.

•

Select the correct battery type (Enhanced Flooded, Flooded, Gel, AGM or AGM Spiral).

•

Input the CCA which matches the vehicle’s battery. NOTE: OE and replacement batteries have
different CCA ratings. Always confirm the battery’s CCA rating before proceeding.

•

If using a DCA-8000 Dynamic Diagnostic Charging System, set the power supply voltage to
13.5 Volts.

•

DO NOT connect the DST-i or DST-010 until the Power Supply mode function has completed its
battery test mode and the Charging Voltage has dropped to and shows a steady 13.5 Volts on the
display.

•

Once Power Supply Mode reaches a steady 13.5 Volts, connect the DST-i or DST-010 to the
OBD connector and proceed with initiating the normal SSM5-R reprogramming process.

•

Amperage will fluctuate based upon the vehicle’s demand for power. NOTE: If the voltage rises
beyond 14 Volts while programming is in process, the procedure will abort. This can indicate a
need to test or charge the vehicle battery before any further attempt at programming is made.

•

ALWAYS set the power supply voltage to 13.5 Volts when using Power Supply Mode. NEVER
turn the ignition switch on when charging at voltages 15 Volts or higher.

REMINDER: If the DCA-8000 or GR8-1100 indicates the vehicle’s battery must be charged, charge
the battery fully before proceeding to reprogram the vehicle while using the Power Supply Mode.
NOTE: Control module failures resulting from battery discharge during reprogramming are not a
matter for warranty. Should any DTCs reset after the reprogramming update is performed, diagnose
per the procedure outlined in the applicable Service Manual.

Continued...
Bulletin Number: 16-153-25; Date: 06/23/25

Page 2 of 3

WARRANTY / CLAIM INFORMATION:
WARRANTY / CLAIM INFORMATION: For vehicles within the Powertrain Warranty period or
covered by an active Subaru Added Security Powertrain*, Classic or Gold plan, this repair may be
submitted using the following claim information:
LABOR DESCRIPTION

LABOR OPERATION #

LABOR TIME

FAIL CODE

TRANSMISSION CONTROL
MODULE REPROGRAMMING

A860-086

.5

MJZ-48

*For vehicles registered in CalLEV states repair covered by California Emissions Extended Defect
Warranty.
IMPORTANT: Always note the original Calibration Identification number (CID) / ROMID the
vehicle came in with on the repair order before reprogramming and, make sure to list the NEW CID /
ROMID for any newly installed programming (as confirmed from the actual control module AFTER
installation). The NEW CID / ROMID MUST also be noted on the repair order as this information is
required for entry in the Miscellaneous Detail field during claim submission. These numbers can be
read using SSM5-R.
NOTE: The pfc file listings provided in this bulletin are the latest available at the time of publishing.
Updates are often released thereafter without revision to the original bulletin. For this reason, it is
critical to always have the latest version of Select Monitor software installed on your system. You
can confirm if a later version is available by entering the CID listed in this bulletin into SSM5-R. If a
newer CID is shown as available in SSM5-R, reprogram using that file.
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.

Bulletin Number: 16-153-25; Date: 06/23/25

Page 3 of 3