P0A93: 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 P0A93 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 P0A93, 3 of them since 2015, across 2 different models. The component owners most often filed it under: engine and engine cooling:cooling system.

Most-reported models

VehicleComplaintsModel years reported
TOYOTA PRIUS52004, 2005, 2007, 2008, 2009

Manufacturer service bulletins that name P0A93

3 technical service bulletins and manufacturer communications filed with NHTSA mention P0A93, from 2 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • FORD F-650 SD (2023, 2022), bulletin 10249432: Some 2022-2023 F-150 and 2023 F-Super Duty vehicles equipped with a direct current/alternating current converter module A (DCACA) inverter (minor feature code HUKAK) may exhibit a Please Contact Authorized Dealer For Ser…
  • KIA NIRO (2018, 2019), bulletin 10152899: TSB -COMBINATION TSB / SERVICE ACTION: COOLANT LEAK ? OBC INLET HOSE DETACHING (SA365) - This bulletin provides the procedure to install an onboard charger (OBC) quick disconnect spacer on some 2018-2019MY Niro (DE PHEV)…
  • KIA NIRO PHEV (2018, 2019), bulletin 10165621: TSB: COMBINATION TSB / SERVICE ACTION: COOLANT LEAK OBC INLET HOSE DETACHING (SA365) - This bulletin has been revised to include additional information.This bulletin provides the procedure to install an onboard charger (…

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.