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Home >> Chevrolet >> 2003 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> ENGINE CONTROLS - SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline >> Diagnostic Tests >> DTC P0101: Mass Air Flow Sensor Performance >> Test Description

Test Description

The numbers below refer to the step numbers in the diagnostic procedure.

  1. 5

    This step will determine if the MAP sensor pressure is within the proper range for a given altitude.
  2. 6

    This step will determine if the MAP sensor voltage is within the proper range at idle.
  3. 7

    This step will determine if the MAP sensor responds properly to the change in manifold pressure.
  4. 8

    This step will determine if the TP sensors are operating properly.
  5. 9

    This step will determine if any mechanical faults have caused this DTC to set.
  6. 10

    This voltage drop test will determine if high resistance has caused this DTC to set.