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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.0L (LTG) - DTC P0010 To DTC P0443 >> Diagnostic Information and Procedures >> DTC P00F4-P00F6: Intake Air Humidity Sensor Circuit >> Circuit/System Verification

Circuit/System Verification

NOTE: To minimize the effects of residual engine heat and sensor internal heating elements, perform Steps 1 and 2 of this verification procedure only if the ignition has been OFF for 8 hours or more.
  1. Ignition On.
  2. Verify that DTC P0102, P0103, P0641, P0651, P0697, P06A3 or P06D2 is not set.
    • If none of the DTCs are set 
  3. Verify the following scan tool parameters are within 30°C (54°F) of each other.
    • Start-Up IAT Sensor 1
    • IAT Sensor 2
    • If not within 30°C (54°F) 

      Refer to Circuit/System Testing.

    • If within 30°C (54°F) 
  4. Engine Running.
  5. Verify the scan tool Intake Air Humidity Sensor parameter is between 5 and 90%.
    • If not between 5 and 90% 

      Refer to Circuit/System Testing.

    • If between 5 and 90% 
  6. 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.
  7. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  8. All OK
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