P2442: 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 P2442 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

107 complaints filed with NHTSA mention P2442, 96 of them since 2015, across 6 different models. The component owners most often filed it under: engine.

Most-reported models

VehicleComplaintsModel years reported
TOYOTA TACOMA842012, 2015
TOYOTA TUNDRA192007, 2008, 2009, 2011, 2012

Manufacturer service bulletins that name P2442

16 technical service bulletins and manufacturer communications filed with NHTSA mention P2442, from 3 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • 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…
  • TOYOTA SEQUOIA (2014, 2015), bulletin 10109360: TSB: Some 2014 - 2015 model year Sequoia and Tundra vehicles equipped with 3UR engines may exhibit a MIL "ON" condition with the following Diagnostic Trouble Codes (DTCs): ? P2440: Secondary Air Injection System Switchin…
  • AUDI RS 5 CABRIOLET (2013, 2011, 2012, 2014), bulletin 10119983: The MIL is on. DTCs P2440(00) and/or P2442(00) are stored in the ECM. One of the combi valves is defective or the vacuum solenoid is defective.
  • TOYOTA TACOMA (2012), bulletin 10140599: TSB: Some 2012 model year Tacoma vehicles equipped with the 1GR-FE engine may exhibit a MIL ?ON? condition with Diagnostic Trouble Codes (DTCs) P2440/P2442 (Secondary Air Injection System Switching Valve Stuck Open Bank …

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.