P3190: 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 P3190 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

6 complaints filed with NHTSA mention P3190, 5 of them since 2015, across 4 different models. The component owners most often filed it under: electrical system.

Most-reported models

VehicleComplaintsModel years reported
TOYOTA PRIUS32007, 2010

Manufacturer service bulletins that name P3190

9 technical service bulletins and manufacturer communications filed with NHTSA mention P3190, from 2 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • TOYOTA HIGHLANDER (2017, 2018), bulletin 10143923: TSB: Some 2017 ? 2018 model year Highlander Hybrid vehicles may exhibit a MIL ?ON? condition with Diagnostic Trouble Code (DTC) P3190 (Poor Engine Power). This may occur when operating the vehicle in high altitude and hi…
  • LEXUS RX HYBRID (2016, 2017, 2018), bulletin 10146008: TSB: Some 2016 ? 2018 model year RX 450h and 2018 model year RX 450h L vehicles may exhibit a MIL ?ON? condition with Diagnostic Trouble Code (DTC) P3190 (Poor Engine Power). This condition may occur when operating the v…
  • TOYOTA PRIUS V (2012, 2013, 2010, 2011), bulletin 10111144: TSB: Some 2010 - 2013 model year Prius and 2012 - 2013 model year Prius V vehicles may exhibit a MIL "ON" condition with Diagnostic Trouble Code(s) (DTCs) P0A0F (Engine Failed to Start), caused by Purge VSV/PCV line sepa…
  • LEXUS CT HYBRID (2011, 2012, 2013), bulletin 10111152: LSB: Some 2011 - 2013 model year CT 200h vehicles may exhibit a MIL "ON" condition with Diagnostic Trouble Code (DTC) P0A0F (Engine Failed to Start), caused by Purge VSV/PCV line separation from the throttle body housing…
  • TOYOTA PRIUS (2010, 2011, 2012, 2013), bulletin 10111294: TSB: Some 2010 - 2013 model year Prius and 2012 - 2013 model year Prius V vehicles may exhibit a MIL "ON" condition with Diagnostic Trouble Code(s) (DTCs) P0A0F (Engine Failed to Start), caused by Purge VSV/PCV line sepa…
  • LEXUS RX450H (2010, 2011, 2012, 2013), bulletin 10133806: Some 2010 - 2013 model year RX 450h vehicles may exhibit a MIL "ON" condition with Diagnostic Trouble Codes (DTCs) P3190 and P0A0F with information code 204 present. Refer to the repair procedure in this bulletin to addr…

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.