P0597: 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 P0597 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

10 complaints filed with NHTSA mention P0597, 10 of them since 2015, across 7 different models. The component owners most often filed it under: fuel/propulsion system.

Most-reported models

VehicleComplaintsModel years reported
CHEVROLET VOLT42016, 2017, 2018

Manufacturer service bulletins that name P0597

3 technical service bulletins and manufacturer communications filed with NHTSA mention P0597, from 1 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • GENESIS G80 (2018, 2017), bulletin 10183956: Certain G80 and G90 Genesis vehicles may experience DTC code P0597 for Thermostat Heater Control Circuit/Open. This bulletin provides information on replacing the electric thermostat. No drivability issues are associated…
  • GENESIS G90 (2017, 2018), bulletin 10191796: Certain G80 and G90 Genesis vehicles may experience DTC code P0597 for Thermostat Heater Control Circuit/Open. This bulletin provides information on replacing the electric thermostat. No drivability issues are associated…

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.