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P0102 Diagnostic Trouble Code Discussion for October 2014

Mass Airflow Sensor Circuit Low Voltage

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Trouble Ticket Help Requests for DTC P0102
Help Request Posted
1999 Chevrolet K2500 Suburban 7.4L MIL Lamp on VIN: 3GNGK26JXX
P0102: MAF Sensor Circuit Low Frequency. This one has me stumped. What's going on with this vehicle is its over calculating with it's MAF sensor. AT idle, the total fuel trims are -10 on bank 1 and -12 on bank 2. Under a load, they're -25 to -30. If I unplug the MAF sensor and reset the fuel trims, t...
October 31, 2014