OBD-II code family
Secondary Air Switching Valve Stuck Open Bank Faults (2 codes)
2 related fault descriptions. Use each full code and the exact vehicle service information to identify its circuit, monitored condition, and required tests.
Codes in this family
This is the complete published member list for this guide. Each code retains its own page; shared diagnostic context does not mean that every member has the same test or repair.
What these codes mean
P2440 identifies the secondary-air switching-valve stuck-open condition on bank 1; P2442 identifies it on bank 2. These are monitor classifications, not direct measurements proving airflow or diagnoses of particular failed valves. Retain the bank number when selecting the vehicle procedure and locating the installed hardware. It does not specify a vehicle side, valve count or shared actuation layout.
Toyota T-SB-0144-14 provides a specific example for some 2014–2015 Sequoia and Tundra vehicles with 3UR engines. It names debris or ice as a possible contributor and describes revised ECM logic. Calibration applicability is part of the procedure: page 6 sends an already-updated vehicle back to normal Repair Manual diagnosis. The eligible update is not a guarantee of healthy hardware or a reason to dismiss a demonstrated physical fault.
Record both bank codes and other secondary-air faults if present. A pair can guide the matched diagnostic sequence, but it does not prove one common cause, two failed valves or any particular shared vacuum or electrical arrangement. Naturally occurring cold-weather history is useful to report; it does not establish icing, a drainage defect or recovery after thawing.
Keep owner checks to safely accessible visual observations with the engine switched off and cooled. Leave air-line access, hot exhaust work, forced operation, connected testing and programming to a qualified technician following the applicable service instructions. Confirmation uses that vehicle’s required monitor conditions, not an assumed driving duration or a cleared light.
Ask for an itemized estimate tied to the diagnostic findings or applicable service action, including any required calibration work, components and confirmation. Neither code alone establishes trip safety or an emissions-inspection outcome. Follow the handbook and obtain assistance for overheating, smoke, abnormal exhaust symptoms, severe roughness, unsafe power loss or a flashing warning.
Identify the circuit on your vehicle
Match the full DTC, reporting module, and any failure-type suffix to the service information for your exact year, make, model, engine, and equipment. An identifier alone does not establish installed hardware count, location, connector pinout, or a universal measurement.
Where the manufacturer publishes its own meaning for this code, that is the one to work from — it describes the actual component on your vehicle, which the generic definition cannot. Keep the generic description for what it is good for: it tells you which subject area the standard assigned the code to, which is useful context when the two appear to disagree. If they do disagree, follow the manufacturer.