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Airflow Sensor

  1. Connect voltmeter between terminals No. 4 and 5 of airflow sensor connector. See Fig 1 . Warm engine to normal operating temperature and slow idle. Measure voltage between terminals No. 4 and 5.
  2. With engine at idle and at 3000 RPM, 2.7-3.2 volts should be present. If not, replace airflow sensor.
Fig 1: Checking Sonata Airflow Sensor
G122011Courtesy of HYUNDAI MOTOR CO.