P1440: owner reports and bulletins

Powertrain (manufacturer-specific). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got P1440 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

8 complaints filed with NHTSA mention P1440, 8 of them since 2015, across 3 different models. The component owners most often filed it under: electrical system.

Most-reported models

VehicleComplaintsModel years reported
ACURA ILX52013

Manufacturer service bulletins that name P1440

4 technical service bulletins and manufacturer communications filed with NHTSA mention P1440, from 3 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • HONDA CIVIC HYBRID (2012, 2013, 2014, 2015), bulletin 10184658: "Service Bulletin - The Motor Power Inverter (MPI), also known as the Intelligent Inverter Unit (IIU), may fail over time due to a defective solder joint. This failure may result in one or more of the following DTC(s): -…
  • ACURA ILX HYBRID (2013), bulletin 10184664: "Service Bulletin - The motor power inverter (MPI), also known as the intelligent inverter unit (IIU), may fail over time due to a defective solder joint. This failure may result in one or more of the following DTC(s): -…
  • TOYOTA 4RUNNER (2005, 2006, 2007, 2008), bulletin 10132097: Some 2005 ? 2009 model year 4Runner, 2006 ? 2007 model year Land Cruiser, 2005 ? 2007 model year Sequoia, and 2005 ? 2006 model year Tundra vehicles equipped with the 2UZ-FE (4.7 L) engine may exhibit a MIL ?ON? conditio…

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.