Replacing Genesis thermostat

    Sept. 10, 2024
    Certain 2018 Genesis G80 vehicles equipped with a 3.3Y or 3.8L engine and built before Aug. 30, 2017, and 2017-2018 G90 vehicles equipped with a 3.3T engine and built before Aug. 30, 2017, may experience a DTC P0597 (thermostat heater control circuit/open).
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    Photo courtesy of Mitchell 1
    Note the location of the lot date code.
    Note the location of the lot date code.

    Certain 2018 Genesis G80 vehicles equipped with a 3.3Y or 3.8L engine and built before Aug. 30, 2017, and 2017-2018 G90 vehicles equipped with a 3.3T engine and built before Aug. 30, 2017, may experience a DTC P0597 (thermostat heater control circuit/open).

    To replace the thermostat, make sure that the new part has a newer lot date than July 20, 2017. A blue marking will indicate lot date placement. Using GDS, check for codes and clear after replacement.

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    Motor Age Staff

    Motor Age has been publishing technical content for professional automotive technicians since 1899. Our writers have decades of experience and scores of ASE certifications, and they continue to teach new generations of technicians via classrooms all around the globe, as well as through the books and training manuals they've authored. 

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