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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 129 (Engine Controls And Fuel - 3.6L (LF4) - Diagnostic Information And Procedures (1 Of 3)) >> Diagnostic Information and Procedures >> DTC P0016, P0017, P0018, or P0019 >> Circuit/System Verification

Circuit/System Verification

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NOTE:
  • The engine oil level and the oil pressure are critical to the correct operation of the system.Verify the engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.
  • The engine oil condition has a major impact on the camshaft actuator system. Debris in the oil can interfere with the camshaft position actuator solenoid valve and the mechanical camshaft actuator operation. Inspect for dirty or degraded engine oil.
  • If a crankshaft or camshaft position sensor DTC is set, the scan tool camshaft position actuator output control will be disabled.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify there are no DTCs set related to the following component/system:
    • B23 Camshaft Position Sensor
    • B26 Crankshaft Position Sensor
    • Q6 Camshaft Position Actuator Solenoid Valve
    • Go to next step: If a related DTC is not set 
  3. Engine - Idling
  4. Verify DTC P0016, P0017, P0018, or P0019 is not set.
    • If the DTC is set 
    1. Ignition/Vehicle - Off
    2. Verify the following conditions do not exist:
      • B23 Camshaft Position Sensor - Incorrect installation
      • B26 Crankshaft Position Sensor - Incorrect installation
      • Q6 Camshaft Position Actuator Solenoid Valve - Incorrect installation/Stuck Closed/Stuck Open
      • Q84 Camshaft Position Actuator Park Lock Solenoid Valve - /Stuck Closed/Stuck Open
      • Reluctor Ring - Misaligned @ Crankshaft
      • Timing Belt or Timing Chain - Excessive play
      • Timing Belt Tensioner or Timing Chain Tensioner - Incorrect installation
      • If a condition exists - Repair or replace as necessary
      • If none of the conditions exists - Refer to step 2.
    • Go to next step: If the DTC is not set 
  5. 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 

      One of the above conditions still exist.

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