P2440: 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 P2440 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

92 complaints filed with NHTSA mention P2440, 78 of them since 2015, across 12 different models. The component owners most often filed it under: engine.

Most-reported models

VehicleComplaintsModel years reported
TOYOTA TACOMA572012, 2013, 2015
TOYOTA TUNDRA212007, 2008, 2011, 2012
TOYOTA SEQUOIA32006, 2007

Manufacturer service bulletins that name P2440

33 technical service bulletins and manufacturer communications filed with NHTSA mention P2440, from 4 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • VOLKSWAGEN TIGUAN (2019, 2020, 2018, 2021), bulletin 10175971: Customer states MIL-on with P0496 Customer states MIL-on with P2440 Customer states MIL-on with U0284 Customer states MIL-on with P02CC, P02CE, P02D0, P02D2, P02D4, and P02D6 P02D7 Customer states oil leak from the engin…
  • VOLKSWAGEN ATLAS (2018, 2019, 2020, 2021), bulletin 10175599: Customer states MIL-on with P0496 Customer states MIL-on with P2440 Customer states MIL-on with U0284 Customer states MIL-on with P02CC, P02CE, P02D0, P02D2, P02D4, and P02D6 P02D7 Customer states oil leak from the engin…
  • VOLKSWAGEN GOLF SPORTWAGEN (2019, 2020), bulletin 10172020: Customer states MIL-on with P0133 No Crank/No Start with P06EF and/or P06E9 Customer states MIL-on with P0463 Customer states MIL-on with P0496 Customer states MIL-on with P04F0 P0441 Customer states MIL-on with P2440 Cu…
  • VOLKSWAGEN GOLF (2019, 2020), bulletin 10172584: Customer states MIL-on with P0133 No Crank/No Start with P06EF and/or P06E9 Customer states MIL-on with P0463 Customer states MIL-on with P0496 Customer states MIL-on with P04F0 P0441 Customer states MIL-on with P2440 Cu…
  • LEXUS GX460 (2014, 2015, 2016), bulletin 10086315: TSB: SOME 2014 2016 MODEL YEAR GX 460 VEHICLES MAY EXHIBIT A MIL ON CONDITION WITH DIAGNOSTIC TROUBLE CODE (DTC) P2440 (SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE STUCK OPEN, BANK 1) OR P2442 (SECONDARY AIR INJECTION…
  • TOYOTA TUNDRA (2014, 2015, 2016), bulletin 10086600: TSB: SOME 2014 2016 MODEL YEAR TUNDRA (1UR-FE) VEHICLES MAY EXHIBIT A MIL ON CONDITION WITH DIAGNOSTIC TROUBLE CODE (DTC) P2440 (SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE STUCK OPEN, BANK 1), OR P2442 (SECONDARY AIR…

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.