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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 165 (Engine Controls And Fuel - 2.7L (L3B) - Diagnostic Information And Procedures (1 Of 3)) >> Diagnostic Information and Procedures >> DTC P0096, P00E9, or P0111 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P0097, P0098, P00EA, P00EB, P0112, P0113, P0117, P0118, P1682, P16A7, P16BC, P2199, P2610 is not set.
    • Go to next step: If none of the DTCs are set 
  3. Verify the scan tool Freeze Frame/Failure Records parameters listed below are within 25°C (45°F) of the following parameter: Start-Up Engine Coolant Temperature Sensor
    • Start-Up Intake Air Temperature Sensor
    • Start-Up Intake Air Temperature Sensor 2
    • Start-Up Intake Air Temperature Sensor 3
    • If not within 25°C (45°F) of each other 
    • {Start-Up Intake Air Temperature Sensor} & {Start-Up Intake Air Temperature Sensor 2}

      Replace the component: B75C Multifunction Intake Air Sensor

    • {Start-Up Intake Air Temperature Sensor 3} Refer to: DTC P00EA-P00EC 
    • Go to next step: If within 25°C (45°F) of each other 
  4. Engine - Idling
  5. Verify the scan tool parameter:=-39 to 149°C (-38 to 300°F) and changes
    • Intake Air Temperature Sensor
    • Intake Air Temperature Sensor 2
    • Intake Air Temperature Sensor 3
    • If not in the specified range or does not change 
    • Go to next step: If in the specified range and changes 
  6. Verify the appropriate scan tool parameter:
    • Intake Air Temperature Sensor = The value should not spike or drop out.
    • Intake Air Temperature Sensor 2 = The value should not spike or drop out.
    • Intake Air Temperature Sensor 3 = The value should not spike or drop out.

      Perform the action while monitoring the parameter:

    • Wiggle the harness and connector: B65 Manifold Absolute Pressure and Intake Air Temperature Sensor
    • Wiggle the harness and connector: B75 Mass Airflow Sensor
    • Wiggle the harness and connector: 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 
  7. All OK.
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