SFI SYSTEM, Diagnostic DTC:P0011, P0012, P0021, P0022

DTC Code DTC Name
P0011 Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)
P0012 Camshaft Position "A" - Timing Over-Retarded (Bank 1)
P0021 Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 2)
P0022 Camshaft Position "A" - Timing Over-Retarded (Bank 2)

DESCRIPTION

The VVT system includes the ECM, camshaft timing oil control valve and VVT controller. The ECM sends a target duty cycle control signal to the camshaft timing oil control valve. This control signal regulates the oil pressure supplied to the VVT controller. Camshaft timing control is performed according to engine operating conditions such as the intake air volume, throttle valve position and engine coolant temperature. The ECM controls the camshaft timing oil control valve based on the signals transmitted by several sensors. The VVT controller regulates the intake camshaft angle using oil pressure through the camshaft timing oil control valve. As a result, the relative positions of the camshaft and crankshaft are optimized, the engine torque and fuel economy improve, and the exhaust emissions decrease under overall driving conditions. The ECM detects the actual intake valve timing using signals from the VVT and crankshaft position sensors and performs feedback control. This is how the target intake valve timing is verified by the ECM.

A01EOS6E17
DTC No. DTC Detection Condition Trouble Area

P0011

P0021

Intake valve timing is stuck at a certain value when in the advance range (1 trip detection logic).
  • Mechanical system (Timing chain has jumped tooth or chain stretched)

  • Camshaft timing oil control valve assembly for intake camshaft

  • Oil control valve filter

  • Camshaft timing gear assembly for intake camshaft

  • ECM

P0012

P0022

Intake valve timing is stuck at a certain value when in the retard range (2 trip detection logic).
  • Mechanical system (Timing chain has jumped tooth or chain stretched)

  • Camshaft timing oil control valve assembly for intake camshaft

  • Oil control valve filter

  • Camshaft timing gear assembly for intake camshaft

  • ECM

MONITOR DESCRIPTION



CONFIRMATION DRIVING PATTERN

A01ESFNE02

  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).

  4. Turn the engine switch off and wait for at least 30 seconds.

  5. Turn the engine switch on (IG) and turn the GTS on [A].

  6. Start the engine and warm it up until the ECT reaches 75°C (167°F) or higher [B].

  7. Drive the vehicle at approximately 60 km/h (37 mph) for 10 minutes or more [C].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  8. Idle the engine for 3 minutes or more [D].

  9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [E].

  10. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  12. Input the DTC: P0011, P0012, P0021 or P0022.

  13. Check the DTC judgment result.

    GTS Display Description
    NORMAL
    • DTC judgment completed

    • System normal

    ABNORMAL
    • DTC judgment completed

    • System abnormal

    INCOMPLETE
    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions

    N/A
    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform steps [F] through [H].

  14. Repeat the pattern of accelerating the vehicle from rest to approximately 60 km/h (37 mph) and then decelerating the vehicle 10 to 15 times [F].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    Tech Tips

    Depress the accelerator pedal by a large amount.

  15. Idle the engine for 3 minutes or more [G].

  16. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [H].

  17. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  18. Check the DTC judgment result again.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

WIRING DIAGRAM

Refer to DTC P0010 Click here.

INSPECTION PROCEDURE

Tech Tips

DTC P0011, P0012, P0021 or P0022 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain set even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.

Tech Tips

Abnormal Bank

Timing Over-advanced

(Valve Timing is Out of Specified Range)

Timing Over-retarded

(Valve Timing is Out of Specified Range)

Bank 1 P0011 P0012
Bank 2 P0021 P0022

  • If DTC P0011 or P0012 is output, check the left bank VVT system for the intake camshaft circuit (for Bank 1).

  • If DTC P0021 or P0022 is output, check the right bank VVT system for the intake camshaft circuit (for Bank 2).

  • Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

  • Bank 1 refers to the bank that includes the No. 1 cylinder*.

    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

PROCEDURE


  1. CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011, P0012, P0021 OR P0022)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    5. Read DTCs.

      Result
      Result Proceed to
      P0011, P0012, P0021 or P0022 is output A
      P0011, P0012, P0021 or P0022 and other DTCs are output B

      Tech Tips

      If any DTCs other than P0011, P0012, P0021 or P0022 are output, troubleshoot those DTCs first.


    B
    A
  2. PERFORM ACTIVE TEST USING GTS (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE)


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Warm up the engine.

    5. Turn the A/C on.

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Linear (Bank 1) or Control the VVT Linear (Bank 2).

    7. Check the engine speed while operating the camshaft timing oil control valve using the GTS.

      OK
      GTS Operation Specified Condition
      0% Normal engine speed
      100% Engine idles roughly or stalls

      Tech Tips

      Refer to "Data List / Active Test" [VVT OCV Duty #1, VVT Change Angle #1, VVT OCV Duty #2 and VVT Change Angle #2] Click here.


    NG
    OK
  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011, P0012, P0021 OR P0022)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear DTCs Click here.

    5. Start the engine and warm it up.

    6. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

    7. Read the output pending DTCs using the GTS.

      OK
      No pending DTC output.

    NG
    OK
  4. CHECK VALVE TIMING (CHECK FOR LOOSENESS IN TIMING CHAIN AND WHETHER TIMING CHAIN HAS JUMPED TOOTH)

    A01EPG6E01

    1. Remove the cylinder head cover LH and RH.

    2. Turn the crankshaft pulley and align its groove with the "0" alignment mark of the timing chain cover.

    3. Check that the alignment marks of the camshaft timing gears and camshaft timing exhaust gears are at the positions shown in the illustration.

      Tech Tips


      • If the alignment marks are not as shown, turn the crankshaft one revolution clockwise.


      • If the result is not as specified, check mechanical parts related to valve timing for looseness in the timing chain, jumped teeth, etc.

      OK
      Alignment marks on camshaft timing gears are aligned as shown in the illustration.

    NG
    OK
  5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY


    1. Inspect the camshaft timing oil control valve assembly Click here.


    NG
    OK
  6. INSPECT OIL CONTROL VALVE FILTER


    1. Remove the oil control valve filter Click here.

    2. Check that the filter is not clogged.

      OK
      Filter is not clogged.

    NG
    OK
  7. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY


    1. Replace the camshaft timing gear assembly Click here.


    NEXT
  8. CHECK WHETHER DTC OUTPUT RECURS


    1. Perform the Confirmation Driving Pattern.

      OK
      No pending DTC is output and All Readiness is NORMAL.

      Tech Tips

      DTC P0011, P0012, P0021 or P0022 is stored when foreign objects in the engine oil are caught in some parts of the system. These codes will remain stored even if the system returns to normal after a short time. These foreign objects are then captured by the oil filter, thus eliminating the source of the problem.


    NG
    OK