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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 252 (Engine Control System & Fuel - 4.8L, 5.3L, 6.0L, Or 6.2L - DTC P0230 To DTC P0690) >> DTC P0506 or P0507 >> Circuit/System Verification

Circuit/System Verification

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IMPORTANT: The engine must first be running for greater than 60 seconds, then idle at a steady state for an additional 10 seconds before comparing the actual and desired engine idle speed parameters.
  1. Use a scan tool to compare the desired engine idle speed to the actual engine idle speed.
    • Actual engine idle speed should be no greater than 100 RPM below desired.
    • Actual engine idle speed should be no greater than 200 RPM above desired.
  2. If any other DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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