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Home >> Cadillac >> 2017 >> CTS V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.2L (LT4) - DTC P0010 To DTC P0331 >> 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 the following scan tool parameters are within 25°C (45°F) of each other.
    • Start-Up IAT Sensor 1
    • Start-Up IAT Sensor 2
    • Start-Up ECT
    • If not within 25°C (45°F) 

      Refer to Circuit/System Testing.

    • If within 25°C (45°F) 
  3. Engine idling, verify the scan tool Intake Air Humidity parameter is between 5 and 90%.
    • If not between 5 and 90% 

      Refer to Circuit/System Testing.

    • If between 5 and 90% 
  4. 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.
  5. Verify the DTCs do not set.
    • If any DTC sets 

      Refer to Circuit/System Testing.

    • If no DTCs set 
  6. All OK
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