P2797: 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 P2797 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 P2797, 8 of them since 2015, across 4 different models. The component owners most often filed it under: electrical system.

Most-reported models

VehicleComplaintsModel years reported
CHEVROLET BOLT EUV42023

Manufacturer service bulletins that name P2797

26 technical service bulletins and manufacturer communications filed with NHTSA mention P2797, from 6 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • SUBARU LEGACY (2023, 2024), bulletin 10246131: This bulletin announces availability of new reprogramming files for the Transmission Control Module (TCM) developed to address cases of DTC P2797 (Electrical/Auxiliary Transmission Fluid Pump A Performance/Stuck Off).
  • SUBARU OUTBACK (2023, 2024), bulletin 11006941: This bulletin announces availability of new reprogramming files for the Transmission Control Module (TCM) developed to address cases of DTC P2797 (Electrical/Auxiliary Transmission Fluid Pump A Performance/Stuck Off).
  • CHEVROLET TRAILBLAZER (2021, 2022, 2023, 2019), bulletin 10235801: This service bulletin provides a repair procedure to correct a customer concern of start/stop inoperative, MIL illuminated w/DTC P2797.
  • BUICK ENCORE GX (2020, 2021, 2022, 2023), bulletin 10235801: This service bulletin provides a repair procedure to correct a customer concern of start/stop inoperative, MIL illuminated w/DTC P2797.
  • CHEVROLET BOLT EUV (2022, 2023, 2021), bulletin 10240188: This service bulletin provides diagnostic aid information for DTC P2797, P2798 or P0C2D for Transmission Fluid Pump Performance to correct a customer concern of Propulsion Power is Reduced message on DIC combined with a …
  • CHEVROLET MALIBU (2019, 2020, 2021), bulletin 10176612: This technical bulletin provides a procedure to replace the transmission auxiliary pump to correct a condition of start/stop inoperative, MIL illuminated w/DTC P2797.

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.