Hyundai Sonata (2009)

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    Warnings and indicators
    All warning lights are checked by turning the ignition switch ON (do not start the engine). Any light that does not illuminate should be checked by an authorized HYUNDAI dealer. After starting th ...

    Checking the amount of air conditioner refrigerant and compressor lubricant
    When the amount of refrigerant is low, the performance of the air conditioning is reduced. Overfilling also has a negative impact on the air conditioning system. Therefore, if abnormal operation i ...

    4WD lock system
    4WD lock system (With Electronic Control 4WD) (If installed) This 4WD system is designed for dividing the power ratio automatically in normal driving conditions. During off-road or low-friction d ...