P0AA6: 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 P0AA6 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

14 complaints filed with NHTSA mention P0AA6, 12 of them since 2015, across 10 different models. The component owners most often filed it under: electrical system.

Most-reported models

VehicleComplaintsModel years reported
TOYOTA PRIUS32007, 2008
NISSAN LEAF32017, 2018

Manufacturer service bulletins that name P0AA6

52 technical service bulletins and manufacturer communications filed with NHTSA mention P0AA6, from 11 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • NISSAN LEAF (2019, 2020, 2021, 2022), bulletin 11004974: VEHICLE WILL NOT START AND DTCS P31E7 AND P0AA6 STORED IN EV/HEV CONTROL MODULE This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
  • MAZDA CX-90 (2024, 2025), bulletin 11010989: Some customers may complain that the heater does not work properly and that a warning about a hybrid abnormality appears on the Instrument Cluster. Upon inspection, the vehicle may have DTC P0AA6:00 (High voltage insulat…
  • FORD EXPLORER (2020, 2021, 2022, 2023), bulletin 10237795: Some 2020-2023 Aviator/Explorer vehicles equipped with a 3.0L hybrid engine may exhibit illuminated powertrain malfunction (wrench) indicator and stop safely now warning. Diagnostic trouble code (DTC) P0AA6:00 may be sto…
  • LINCOLN AVIATOR (2020, 2021, 2022, 2023), bulletin 10237795: Some 2020-2023 Aviator/Explorer vehicles equipped with a 3.0L hybrid engine may exhibit illuminated powertrain malfunction (wrench) indicator and stop safely now warning. Diagnostic trouble code (DTC) P0AA6:00 may be sto…
  • FORD MUSTANG MACH E (2021), bulletin 10191522: Some 2021 Mustang Mach-E vehicles may exhibit an illuminated Powertrain Malfunction (wrench)indicator with diagnostic trouble code (DTC) P0AA6 stored in the Battery Energy Control Module (BECM). Because of the importance…
  • JEEP WRANGLER (2021), bulletin 10218554: Possible Water Intrusion at the P1 and P2 High Voltage (HV) Connectors This bulletin involves inspecting and if necessary replacement of the orange seal(s) for the P1&P2 electrical connectors. The customer states that ve…

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.