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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 2.0L (LTG) - DTC P0010 To DTC P0333 >> Diagnostic Information and Procedures >> DTC P00F4-P00F6: Intake Air Humidity Sensor >> Circuit/System Description

Circuit/System Description

The sensors listed below are integrated within the Multifunction Intake Air sensor:

The humidity sensor measures the ambient humidity of the air in the sensor bore. The signal varies with intake air humidity and is displayed by the scan tool as duty cycle %. The humidity sensor and the intake air temperature (IAT) Sensor 2 share the same signal circuit. The ECM applies 5V to the circuit.

Ignition voltage and ground circuits are supplied to the multifunction intake air sensor's internal circuits for these sensors:

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