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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 369 (Engine Controls And Fuel - 5.3L, 6.0L & 6.2L - DTC P0010 Through DTC P0442) >> Diagnostic Information and Procedures >> DTC P0101 or P1101 >> Circuit/System Verification

Circuit/System Verification

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  1. Observe the DTC information with a scan tool. Verify that DTC P0641 or P0651 is not set.
  2. Engine idling, observe the scan tool MAF Sensor parameter. The reading should be between 2, 000-3, 900 Hz depending on the ECT.
  3. A WOT acceleration from a stop should cause the MAF Sensor parameter on the scan tool to increase rapidly. This increase should be from 4-9 g/s at idle to greater than 180 g/s at the time of the 1-2 shift.
  4. Ignition ON, observe the scan tool MAP Sensor pressure parameter and compare to the Altitude Versus Barometric Pressure table. The MAP sensor reading should be within the specified range.
  5. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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