SUBARU

09-131-25R

Manufacturer communications

Publication date: 2025-08-11
Received by NHTSA: 2025-09-02
NHTSA record numbers: 11022300

Manufacturer summary

Original wording in English

This bulletin announces the diagnostic procedures and availability of reprograming files to rectify the following Diagnostic Trouble Codes (DTCs).
• P2404: EVAP System Leak Detection Pump Sense Circuit Range/Performance.
• P0420: Catalyst System Efficiency Below Threshold Bank 1. (not applicable for 15-18 models)

NHTSA manufacturer communications ↗

Reported code forms

P0420 P2404

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

SubaruP2404

EVAP System Leak Detection Pump Sense Circuit Range/Performance

NHTSA 11016166 · NHTSA 11022300

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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