P0448: 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 P0448 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

7 complaints filed with NHTSA mention P0448, 5 of them since 2015, across 4 different models. The component owners most often filed it under: fuel/propulsion system.

Most-reported models

VehicleComplaintsModel years reported
NISSAN FRONTIER42007, 2009, 2017, 2018

Manufacturer service bulletins that name P0448

26 technical service bulletins and manufacturer communications filed with NHTSA mention P0448, from 2 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • INFINITI QX50 (2021, 2022, 2023), bulletin 10229604: MIL ON WITH DTC P0448 STORED IN THE ECM IF YOU CONFIRM The MIL is ON with DTC P0448 (VENT CONTROL VALVE) stored in the ECM. ACTION See Repair Overview on page 2 for diagnostic procedure.
  • NISSAN SENTRA (2017, 2018, 2019, 2015), bulletin 10170017: Engine Control Module (ECM) Reprogram California Voluntary Emissions Service Campaign ***** Campaign Summary***** Nissan is conducting a Voluntary Emissions Service Campaign on approximately 104,221 specific Nissan vehic…
  • INFINITI Q50 (2016, 2017, 2018, 2019), bulletin 10170018: Engine Control Module (ECM) Reprogram California Voluntary Emission Service Campaign ***** Campaign Summary ***** INFINITI is conducting a Voluntary Emissions Service Campaign on approximately 49,497 specific INFINITI ve…
  • INFINITI Q60 (2017, 2018, 2019, 2015), bulletin 10171214: MIL ON WITH DTC P0087, P0101, P0448, OR P2008, VEHICLES REGISTERED OUTSIDE OF CALIFORNIA This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
  • NISSAN ALTIMA (2015, 2016, 2017, 2018), bulletin 10171228: MIL ON WITH DTC P0087, P0101, P0448, OR P2008, VEHICLES REGISTERED OUTSIDE OF CALIFORNIA This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
  • NISSAN FRONTIER (2005, 2006, 2007, 2008), bulletin 10174414: 2005-2019 FRONTIER; MIL ON WITH DTC P0448 This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.

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.