SUBARU

09-110-23

Manufacturer communications

Publication date: 2023-10-09
Received by NHTSA: 2023-11-06
NHTSA record numbers: 10244906

Manufacturer summary

Original wording in English

This Service Information Bulletin announces diagnostic service procedures to be followed when DTC P0420 (Catalyst System Efficiency Below Threshold Bank 1) is detected by the Engine Control Module (ECM). If DTC P0420 is found to be stored in the ECM, follow the diagnostic procedures outlined below.

NHTSA manufacturer communications ↗

Reported code forms

P0420

Manufacturer wording

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

SubaruP0420

Catalyst System Efficiency Below Threshold Bank 1

NHTSA 10244906 · NHTSA 10246083 · NHTSA 11016166

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	LEGACY	2017
Subaru	OUTBACK	2023
Subaru	OUTBACK	2022
Subaru	OUTBACK	2021
Subaru	OUTBACK	2020
Subaru	OUTBACK	2019
Subaru	OUTBACK	2018
Subaru	OUTBACK	2017

Data coverage →