P2404: owner reports and bulletins

Powertrain (generic, all makes). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got P2404 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.

What owners report to NHTSA

1 complaints filed with NHTSA mention P2404, across 1 different models. The component owners most often filed it under: fuel system, gasoline.

Manufacturer service bulletins that name P2404

13 technical service bulletins and manufacturer communications filed with NHTSA mention P2404, from 3 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • SUBARU CROSSTREK (2024), bulletin 10253934: 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. …
  • SUBARU BRZ (2022, 2023, 2024), bulletin 11009691: "This bulletin announces availability of new reprograming files for the Engine Control Module (ECM) developed to remedy the following DTCs: P0016: Crankshaft Position - Camshaft Position Correlation Bank 1 Sensor A P0017…
  • SUBARU LEGACY (2020, 2021, 2022, 2023), bulletin 10240115: 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.
  • SUBARU ASCENT (2019, 2020, 2021, 2022), bulletin 10240114: 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.
  • SUBARU FORESTER (2019, 2020, 2021, 2022), bulletin 11000820: 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. …
  • SUBARU WRX (2022), bulletin 10238463: This bulletin announces the diagnostic procedures and availability of reprogramming files to rectify DTCs P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) and P2109 (Throttle/Pedal Position Sensor …

Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.