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Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (1 Of 5)) >> Diagnostic Information and Procedures >> DTC P0106, P0107, or P0108 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
NOTE:

If you were sent here from DTC P00C7 - Refer to: Circuit/System Testing.

  1. Ignition - On/Vehicle - In Service Mode
  2. Verify DTC P0641, P0651, P0697, P06A3, P06D2 is not set.
    • Go to next step: If none of the DTCs are set 
  3. Verify the scan tool parameter: Manifold Absolute Pressure Sensor = The value should be within the range listed in the table: Altitude Versus Barometric Pressure
    • If not in the specified range 

      Refer to: Circuit/System Testing

    • Go to next step: If in the specified range 
  4. Engine - Idling - At normal operating temperature.
  5. Accessories - Off
  6. Verify the scan tool parameter:
    • Manifold Absolute Pressure Sensor = The value should be within the range listed in the table: Altitude Versus Barometric Pressure
    • Manifold Absolute Pressure Sensor = The value should change with accelerator pedal input.
    • If not in the specified range or does not change 

      Refer to: Circuit/System Testing

    • Go to next step: If in the specified range and changes 
  7. Verify the scan tool parameter: Manifold Absolute Pressure Sensor = The value should not spike or drop out.

    Perform the action while monitoring the parameter:

    • Wiggle the harness and connector(s): B65 Intake Manifold Pressure and Air Temperature Sensor
    • Wiggle the harness and connector(s): K20 Engine Control Module
    • If the value spikes or drops out 

      Repair as necessary - Wiring/Terminal(s)/Electrical Connector(s)

    • Go to next step: If the value does not spike or drop out 
  8. 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.

    Verify that no DTCs are set.

    • If any DTC is set 

      Refer to: Circuit/System Testing

    • Go to next step: If no DTC is set 
  9. All OK.