P2404
0 owner reports and 118 manufacturer filings across 48 model years from Subaru.
Where P2404 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2022 Subaru Forester | Electrical System | 4 | — |
| 2021 Subaru Forester | Electrical System | 4 | — |
| 2020 Subaru Forester | Electrical System | 4 | — |
| 2019 Subaru Forester | Electrical System | 4 | — |
| 2022 Subaru Legacy | Electrical System | 4 | — |
| 2021 Subaru Legacy | Electrical System | 4 | — |
| 2020 Subaru Legacy | Electrical System | 4 | — |
| 2022 Subaru Outback | Electrical System | 4 | — |
| 2021 Subaru Outback | Electrical System | 4 | — |
| 2020 Subaru Outback | Electrical System | 4 | — |
| 2022 Subaru Crosstrek | Electrical System | 3 | — |
| 2021 Subaru Crosstrek | Electrical System | 3 | — |
| 2020 Subaru Crosstrek | Engine | 3 | — |
| 2019 Subaru Crosstrek | Electrical System | 3 | — |
| 2018 Subaru Crosstrek | Fuel/Propulsion System | 3 | — |
| 2023 Subaru Forester | Electrical System | 3 | — |
| 2022 Subaru Impreza | Electrical System | 3 | — |
| 2021 Subaru Impreza | Fuel/Propulsion System | 3 | — |
| 2020 Subaru Impreza | Electrical System | 3 | — |
| 2019 Subaru Impreza | Electrical System | 3 | — |
| 2018 Subaru Impreza | Electrical System | 3 | — |
| 2017 Subaru Impreza | Electrical System | 3 | — |
| 2021 Subaru WRX | Electrical System | 3 | — |
| 2020 Subaru WRX | Electrical System | 3 | — |
| 2019 Subaru WRX | Engine | 3 | — |
| 2018 Subaru WRX | Engine | 3 | — |
| 2017 Subaru WRX | Engine | 3 | — |
| 2016 Subaru WRX | Engine | 3 | — |
| 2024 Subaru Crosstrek | Equipment | 2 | — |
| 2024 Subaru Impreza | Electrical System | 2 | — |
| 2017 Subaru Legacy/Outback | Electrical System | 2 | — |
| 2016 Subaru Legacy/Outback | Equipment | 2 | — |
| 2023 Subaru Ascent | Engine And Engine Cooling | 1 | — |
| 2022 Subaru Ascent | Electrical System | 1 | — |
| 2021 Subaru Ascent | Engine And Engine Cooling | 1 | — |
| 2020 Subaru Ascent | Engine And Engine Cooling | 1 | — |
| 2019 Subaru Ascent | Engine And Engine Cooling | 1 | — |
| 2023 Subaru Crosstrek | Fuel/Propulsion System | 1 | — |
| 2018 Subaru Forester | Equipment | 1 | — |
| 2017 Subaru Forester | Electrical System | 1 | — |
| 2023 Subaru Impreza | Electrical System | 1 | — |
| 2023 Subaru Legacy | Engine And Engine Cooling | 1 | — |
| 2019 Subaru Legacy | Electrical System | 1 | — |
| 2018 Subaru Legacy | Engine And Engine Cooling | 1 | — |
| 2023 Subaru Outback | Engine And Engine Cooling | 1 | — |
| 2019 Subaru Outback | Engine And Engine Cooling | 1 | — |
| 2018 Subaru Outback | Equipment | 1 | — |
| 2022 Subaru WRX | Fuel System, Diesel | 1 | — |
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
What it gets filed under
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P2404. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- 09-118-24R2025-11-20 · 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.
- 09-131-25R2025-08-11 · 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)
- 09-131-252025-04-08 · 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
- 09-131-252025-03-04 · 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)"
- 09-122-24R2025-01-06 · 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.
- 09-122-24R2024-12-19 · 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.
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. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about P2404
Source: NHTSA files and the OBD-II standardCan I keep driving with P2404 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.