What Does P0597 Code Mean?

    OBD-II Code P0597 is defined as a Thermostat Heater Control Circuit/Open

    Some newer engines utilize thermostats that are electronically controlled by the engine control module (PCM). If the PCM detects an incorrect signal from thermostat, the PCM will set code P0597.

    P0597 Symptoms

    • Cooling fans may stay on all the time

    Common Problems That Trigger the P0597 Code

    • Powertrain Control Module (PCM) failure
    • Thermostat failure
    • Wiring issue

    Common Repairs Needed for the P0597 Code

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