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Our automotive experts have put together the following information about the P0539 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0539 code.

OBD II Fault Code

  • OBD II P0539

    OBD-II Code A/C may not operate is defined as a A/C Evaporator Temperature Sensor Circuit Intermittent

    The A/C Evaporator Temperature Sensor is used to prevent the evaporator from getting too cold and freezing up. When the engine control module (PCM) detects a problem with this sensor or the signal from it, the PCM will set code P0539.

    A/C may not operate Symptoms

    • A/C may not operate

    Common Problems That Trigger the P0539 Code

    • A/C evaporator temperature sensor failure
    • A/C low side temperature sensor failure
    • High voltage powertrain control module failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue
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