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Service bulletin 09-109-23

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 id10240121
Published by NHTSA2023-08-02
Manufacturer's number09-109-23
Manufacturer's date2023-07-25
NHTSA componentEQUIPMENT; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE

NHTSA's summary

This bulletin announces diagnostic procedures along with availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sensor Circuit Range/Performance) detection.

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, Equipment and accessories, Engine control module, Wiring and fuses

Trouble codes named

P2404

Vehicles listed
SUBARU LEGACY2016, 2017, 2018, 2019
SUBARU OUTBACK2016, 2017, 2018, 2019

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

Other bulletins for the same vehicles and component
15-299-22R2023-07-03. Service bulletin. This bulletin announces an application change to the Remote Engine Starter (RES) control unit on 2019 Outback & Legacy models.