P2404 on Subaru vehicles
P2404 is named on 48 Subaru model years (2016–2024): 118 manufacturer filings and 0 owner reports in NHTSA’s files, across Forester, Legacy, Outback, Crosstrek, Impreza and 3 more.
Which Subaru model years name P2404
Source: NHTSA manufacturer communications and complaintsA model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Subaru filings that name P2404
Source: NHTSA manufacturer communicationsBulletins and campaigns Subaru filed with NHTSA whose summary names P2404. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 09-113-23 Service bulletin2024-01-11 · Equipment
- This bulletin announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
- 09-122-24 Service bulletin2024-05-14 · Electrical System
- This bulletin the announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
- 09-122-24R Service bulletin2024-12-19 · Engine
- This bulletin the announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
- 09-108-23 Service bulletin2023-07-18 · Engine And Engine Cooling
- This bulletin announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
- 09-122-24R Service bulletin2025-01-06 · Fuel/Propulsion System
- This bulletin the announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
- 09-131-25R Service bulletin2025-08-11 · Engine
- 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)
- 09-131-25 Service bulletin2025-03-04 · Electrical System
- "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)"
- 09-131-25 Service bulletin2025-04-08 · Engine
- This bulletin announces the diagnostic procedures and availability of reprograming files to rectify the following Diagnostic Trouble Codes (DTCs). The ELCM may accumulate condensation causing the inaccurate detection of P2404. P0420 may become falsely detected due to unstable combustion caused by a downshift. The new reprogramming files contains enhanced software allowing for condensation conditio
- 09-118-24 Service bulletin2024-04-04 · Electrical System
- This bulletin the announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
- 09-118-24R Service bulletin2025-11-20 · Electrical System
- This bulletin the announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
- 09-109-23 Service bulletin2023-07-25 · Equipment
- 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.
- 09-107-23 Service bulletin2023-07-18 · Electrical System
- This bulletin announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
What P2404 means
Source: SAE J2012 / OBD-IIP2404 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
A stored code names the test that failed, never the part that caused it. The record above is what Subaru and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P2404 a known problem on Subaru vehicles?
It is a documented one: NHTSA's files hold 118 manufacturer filings and 0 owner reports naming P2404 on 48 Subaru model years (2016–2024). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Subaru models does P2404 appear on most?
2022 Forester (4 documents), 2021 Forester (4 documents), 2020 Forester (4 documents).
Does P2404 on a Subaru mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.