SUBARU

18-228-25R

Manufacturer communications

Publication date: 2025-12-08
Received by NHTSA: 2026-01-06
NHTSA record numbers: 11027081

Manufacturer summary

Original wording in English

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).

NHTSA manufacturer communications ↗

Reported code forms

P2096 P2097

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

SubaruP2096

POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1

NHTSA 11025790 · NHTSA 11027081

SubaruP2097

POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1

NHTSA 11025790 · NHTSA 11027081

Check vehicle applicability

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Make	Model	Model year
Subaru	WRX	2021
Subaru	WRX	2020
Subaru	WRX	2019
Subaru	WRX	2018
Subaru	WRX	2017
Subaru	WRX	2016
Subaru	WRX	2015

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