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Home >> Infiniti >> 2020 >> Q60 Pure, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (1 Of 19) >> Engine (ECM) >> DTC P0014: EVT Control >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK DTC PRIORITY 

    If DTC P0014 is displayed with DTC P0078, first perform the confirmation procedure (trouble diagnosis) for DTC P0078.

    Is DTC P0078 detected?

    YES

    Perform diagnosis of applicable. Refer to DTC Description .

    NO

    GO TO 2.

  2. CHECK OIL PRESSURE WARNING 
    1. Start engine.
    2. Check oil pressure warning and confirm it is not displayed.
      G04073790Courtesy of NISSAN NORTH AMERICA, INC.

    Is oil pressure warning displayed?

    YES

    Check the engine oil level. Refer to ENGINE OIL : Inspection .

    NO

    GO TO 3.

  3. CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE 

    Check the exhaust valve timing control solenoid valve. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Replace malfunctioning exhaust valve timing control solenoid valve. Refer to TIMING CHAIN : Exploded View .

  4. CHECK CRANKSHAFT POSITION SENSOR 

    Check the crankshaft position sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Replace crankshaft position sensor. Refer to DRIVE PLATE : Exploded View .

  5. CHECK EXHAUST CAMSHAFT POSITION SENSOR 

    Check the exhaust camshaft position sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Replace malfunctioning exhaust camshaft position sensor. Refer to CAMSHAFT : Exploded View .

  6. CHECK CAMSHAFT (EXH) 

    Check the following.

    • Accumulation of debris to the signal plate of camshaft rear end
      GNSJMBIA0058Z-058Courtesy of NISSAN NORTH AMERICA, INC.
    • Chipping signal plate of camshaft rear end

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    Remove debris and clean the signal plate of camshaft rear end or replace camshaft. Refer to CAMSHAFT : Exploded View .

  7. CHECK TIMING CHAIN INSTALLATION 

    Check service records for any recent repairs that may cause timing chain misaligned.

    Are there any service records that may cause timing chain misaligned?

    YES

    Check timing chain installation. Refer to TIMING CHAIN : Exploded View .

    NO

    GO TO 8.

  8. CHECK LUBRICATION CIRCUIT 

    Refer to ENGINE OIL : Inspection .

    Is the inspection result normal?

    YES

    INSPECTION END.

    NO

    Clean lubrication line.