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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 2.4L - DTC P0628 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2199: Intake Air Temperature (IAT) Sensors 1-2 Not Plausible (With LEA) >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.

Multifunction Intake Air Sensor

  1. Ignition OFF, disconnect the harness connector at the B75C Multifunction Intake Air sensor.
    2. NOTE:

    A thermometer can be used to test the sensor off the vehicle.

  2. Test the IAT Sensor 1 by varying the sensor temperature while monitoring the sensor resistance. Compare the readings with the Temperature Versus Resistance - Intake Air Temperature Sensor (Hitachi Sensors) table for Hitachi Sensors. The resistance values should be in range of the table values.
    • If the values are not in range of the table values. 

      Replace the B75C Multifunction Intake Air sensor.

    • If the values are in range of the table values. 
  3. All OK.

Multifunction Intake Air Sensor

  1. Test the IAT Sensor 2 by varying the sensor temperature while monitoring the air temperature with a thermometer. Compare the readings with the scan tool IAT Sensor 2 parameter. The values should be within 5%.
    • If the values are not in range. 

      Replace the B75C Multifunction Intake Air sensor.

    • If the values are in range. 
  2. All OK.
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