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Home >> GMC >> 1997 >> Forward Control 4.3 W, L35, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls - Tests W/Codes - 5.7L (P Series)) >> Diagnostic Trouble Codes >> DTC P0103 - MAF Sensor Circuit High Frequency >> Circuit Description

Circuit Description

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Mass Airflow (MAF) sensor measures amount of air entering engine at a given time to determine fuel delivery. MAF sensor produces a frequency signal of 2000 Hz at idle to 8000 Hz at maximum engine load. DTC will set if MAF signal is greater than possible range of a normally-operating MAF sensor.

DTC will set when the following conditions are present:

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