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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 279 (Engine Controls And Fuel - 2.0L (LTG) - DTC P0300 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P111E: Engine Coolant Temperature Sensor Not Plausible >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify that DTC P00B3, P00B4, P0111, P0112, P0113, P0114, P0117, P0118, P0128, P0601, P112F, P1621, or P2610 are not set.
    • If DTC P00B3, P00B4, P0111, P0112, P0113, P0114, P0117, P0118, P0128, P0601, P112F, P1621, or P2610 are not set 
  2. Ignition OFF for a minimum of 8 hours.
  3. Ignition ON, observe scan tool parameters IAT Sensor 1, Radiator Coolant Temperature Sensor and the ECT Sensor and verify they are within 15°C (59°F) of each other and ambient temperature.
    • If the Radiator Coolant Temperature Sensor parameter is not within 15°C (59°F) of the ECT Sensor and IAT Sensor 1 or ambient temperature. 

      Perform the diagnostic for DTC P00B3 or P00B4, Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

    • If the IAT Sensor 1 parameter is not within 15°C (59°F) of the ECT Sensor and Radiator Coolant Temperature Sensor or ambient temperature. 

      Perform the diagnostic for DTC P0112, P0113, or P0114, Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

    • If the ECT Sensor parameter is not within 15°C (59°F) of the IAT Sensor 1 and Radiator Coolant Temperature Sensor or ambient temperature. 

      Refer to Circuit/System Testing.

    • If all the parameters are within 15°C (59°F) of each other and ambient temperature. 
  4. Ignition OFF.
  5. Verify the cooling system is filled to the correct coolant level. Refer to Cooling System Leak Testing , and Cooling System Draining and Filling (Static)Cooling System Draining and Filling (GE 47716) .
    • If the coolant level is not filled to the correct level 

      Repair as necessary.

    • If the coolant level is correct 
  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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