SFI SYSTEM, Diagnostic DTC:P0011, P0012

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)

DESCRIPTION

Tech Tips

If DTC P0011 or P0012 is present, check the VVT (Variable Valve Timing) system.

The VVT system includes the ECM, oil control valve and VVT controller. The ECM sends a target duty-cycle control signal to the camshaft timing oil control valve assembly. This control signal regulates the oil pressure applied 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 assembly, 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 assembly. 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 camshaft and crankshaft position sensors, and performs feedback control. This is how the target intake valve timing is verified by the ECM.

A005U40E22
DTC No. DTC Detection Condition Trouble Area
P0011 The valve timing is not adjusted in the valve timing advance range (1 trip detection logic).

  • Valve timing

  • Camshaft timing oil control valve assembly for intake camshaft

  • Camshaft timing gear assembly

  • ECM
P0012 The valve timing is not adjusted in the valve timing retard range (2 trip detection logic).

  • Valve timing

  • Camshaft timing oil control valve assembly for intake camshaft

  • Camshaft timing gear assembly

  • ECM

WIRING DIAGRAM

Refer to DTC P0010 Click here.

INSPECTION PROCEDURE

Note

DTC P0011 or P0012 may be set 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

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

PROCEDURE


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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P0011 and/or P0012 are output A
      DTC P0011 or P0012 and other DTCs are output B

      Tech Tips

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


    B

    GO TO DTC CHART Click here

    A

  2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY


    1. A005SWVE01

      Remove the camshaft timing oil control valve assembly.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 6.9 to 7.9 Ω
      Text in Illustration
      *1

      Component without harness connected

      (Camshaft Timing Oil Control Valve)
    3. A005S17E02

      Apply positive (+) battery voltage to terminal 1 and negative (-) battery voltage to terminal 2. Check the valve operation.

      OK
      Valve moves quickly.

    4. Reinstall the oil control valve.


    NG

    REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Click here

    OK

  3. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY


    1. Inspect the camshaft timing gear assembly Click here.


    NG

    REPLACE CAMSHAFT TIMING GEAR ASSEMBLY Click here

    OK

  4. ADJUST VALVE TIMING

    Tech Tips

    There are no marks on the cylinder head to match-up for the purpose of checking valve timing. Valve timing can only be inspected by lining up the colored plates on the timing chain with the marks on the pulleys. It may be necessary to remove and re-install the chain to match-up the timing marks Click here.


    NEXT

  5. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Clear the DTCs Click here.

    5. Start the engine and warm it up.

    6. Switch the ECM from normal mode to check mode using the tester.

    7. Allow the engine to idle for 5 minutes or more.

    8. Enter the following menus: Powertrain / Engine and ECT / DTC.

    9. Read the DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P0011 or P0012 is output B

      Tech Tips

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


    B

    REPLACE ECM Click here

    A

    SYSTEM IS OK