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GMC
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1998
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Forward Control 7.4 B
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/Codes - 7.4L
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Diagnostic Trouble Codes
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DTC P0102 - MAF Sensor Circuit Low Frequency
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Low Frequency Test
Low Frequency Test
Engine running.
Engine run time greater than 0.4 second.
System voltage greater than 8 volts.
Conditions present for greater than zero seconds.
MAF signal frequency is less than 10 Hz.