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Service bulletin 18-228-25R

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11027081
Published by NHTSA2026-01-06
Manufacturer's number18-228-25R
Manufacturer's date2025-12-08
NHTSA componentENGINE; FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM

NHTSA's summary

This bulletin announces the diagnostic procedures to be used when DTCs P2096 (POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1) and P2097 (POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1) are detected by the Engine Control Module (ECM).

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine, Fuel system

Trouble codes named

P2096, P2097

Vehicles listed
SUBARU ASCENT2019, 2020, 2021, 2022, 2023, 2024, 2025
SUBARU BRZ2022, 2023, 2024, 2025
SUBARU CROSSTREK2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
SUBARU FORESTER2019, 2020, 2021, 2022, 2023, 2024, 2025
SUBARU IMPREZA2019, 2020, 2021, 2022, 2023, 2024, 2025
SUBARU LEGACY2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
SUBARU OUTBACK2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
SUBARU WRX2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
26V1060002026-02-23. FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP
20260772026-02-20. Fuel System
20236072023-11-09. Electrical
23V7230002023-10-26. ENGINE AND ENGINE COOLING
20234352023-08-04. Electrical
23V5510002023-08-04. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
20230622023-02-14. Electrical
23V0800002023-02-14. ELECTRICAL SYSTEM:12V/24V/48V BATTERY
20227032022-12-08. Electrical
22V9070002022-12-08. ELECTRICAL SYSTEM:WIRING:INTERIOR/UNDER DASH

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
09-141-262026-10-05. Service bulletin. This Bulletin provides a diagnostic procedure for customer concerns about hesitation, reduced acceleration, or lack of power when driving uphill or under heavy engine load.
07-244-262026-10-05. Service bulletin. This Bulletin provides a repair procedure for increased dark current and unintended battery discharge that occurs in a small number of unique cases.
SubaruNet Announcement (M2026-10-05. Other. This announcement provides information on a new software update for the Midtronics Dss and DCA machines.
SubaruNet Announcement (T2026-10-05. Other. This announcement provides information on an enhancement of the TechShare CVT diagnostic assitance application.
18-244-262026-10-05. Service bulletin. "This Bulletin announces additional troubleshooting steps for the following DTCs: DTC C1956: RH Actuator Circuit DTC C1957: LH Actuator Circuit"
15-333-25R2026-10-05. Service bulletin. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure. This is an revised version of the original bulletin.
15-322-25R2026-10-05. Service bulletin. In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the CP1 & Gen 3.1 Head Unit used in the listed models and model years to (8) eight years / 150,000 miles to cover certain qualifying repairs to the infotainment audio system. This is an revised version of the original bulletin.
15-304-22R2026-10-05. Service bulletin. This bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concerns. This is an revised version of the original bulletin.
12-269-25R2026-10-05. Service bulletin. This bulletin announces the service procedures to be followed when encountering instances of water intrusion from the sunroof area.This is an revised version of the original bulletin.
12-258-25R2026-10-05. Service bulletin. This bulletin provides additional examples, diagnostics tips and installation tips as helpful aids to be used when working with sunroof seals and sunroof frame assemblies on Ascent models. This is an revised version of the original bulletin.