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P0101 Diagnostic Trouble Code Discussion for April 2009

Mass Airflow Sensor Performance

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Trouble Ticket Help Requests for DTC P0101
Help Request Posted
2002 Chevrolet Express 2500 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCGG25R02
P0101: MAF Sensor Performance. Misfire Data shows cylinders #5,7,8 missing like crazy at idle. When I run a injector balance test with Master Tech cylinders 5,6,7,8 show no drop in RPM as do you feel no difference in the engine as you do with the front four injectors. THe front injectors yo...
April 01, 2009