2000 Chevy Malibu MAF Ground problem This is a good video on how to check sensor grounds using a voltmeter. Once you get more comfortable with this type of testing, it is far more accurate than the ohmmeter. The key though is to make sure the circuit you are testing is "loaded". Also to all of you "free diagnostics" parts supply companies. YOU CANNOT CHANGE A PART BASED ON A TROUBLE CODE!

Engine Performance Diagnostics chapter 12

symptoms 50

  • hesitation
  • low power
  • MAF sensor code (P0102)

fix 50

  • repair bad engine block ground connector

test shown enh 50

  • MAF sensor scan data tests
  • MAF sensor voltmeter or scope testing
  • how to test a sensor ground circuit
  • how to locate a bad block ground

Tools used

  • scan tool
  • lab scope
  • digital multimeter
  • backprobing tools

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(Chapter 12) Mass Airflow Sensor Testing

Related videos:

MAF sensor code P0102 from a bad engine computer - (Chevy van):


How to test a GM MAF Sensor (Part 1):


How to test a GM MAF Sensor (Part 2):


How to test a MAF sensor using a Picoscope - GM:


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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available as an eBook or paper book.

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