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Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests for electromagnetic interference (EMI) on the signal circuit of the MAF sensor. A frequency reading with the MAF sensor disconnected indicates an EMI related fault or a poor connection. Disconnecting the MAF sensor may set additional related DTCs.
  2. 4. This step eliminates any conditions which can cause a DTC to set with a normally operating MAF sensor.
Fig 1: DTC P0103
G01599285Courtesy of GENERAL MOTORS CORP.
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