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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 398 (Engine Controls And Fuel - 6.2L (LT4) - Diagnostic Information And Procedures (1 Of 3)) >> Diagnostic Information and Procedures >> DTC P0117, P0118, or P0119 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On/Vehicle - In Service Mode
  2. Verify the appropriate scan tool parameter: Engine Coolant Temperature Sensor = -39 to 139°C (-38 to 282°F)
    • If not between -39 and 139°C (-38 and 282°F) 

      Refer to: Circuit/System Testing

    • Go to next step: If between -39 and 139°C (-38 and 282°F) 
  3. Verify the scan tool parameter: Engine Coolant Temperature Sensor = The parameter value should not change
    NOTE:

    For component location, refer to: Repair Instructions

    Perform the action while monitoring the parameter:

    • Wiggle the harness and connector: B34 Engine Coolant Temperature Sensor
    • Wiggle the harness and connector: @K20 Engine Control Module
    • If the parameter value changes 

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

    • Go to next step: If the parameter value does not change 
  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.

    Verify the DTC does not set.

    • If the DTC sets 

      Refer to: Circuit/System Testing

    • Go to next step: If the DTC is not set 
  5. All OK.
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