SFI SYSTEM, Diagnostic DTC:P0014, P0015, P0024, P0025

DTC Code DTC Name
P0014 Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1)
P0015 Camshaft Position "B" - Timing Over-Retarded (Bank 1)
P0024 Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 2)
P0025 Camshaft Position "B" - Timing Over-Retarded (Bank 2)

DESCRIPTION

Refer to DTC P0013 Click here.

DTC No. DTC Detection Condition Trouble Area

P0014

P0024

With engine warmed up and idling, exhaust valve timing does not change for 1 minute or more in advanced position

(2 trip detection logic)

  • Valve timing

  • Oil control valve (OCV) for exhaust side (bank 1, 2)

  • OCV filter (bank 1, 2)

  • Camshaft timing exhaust gear assembly

  • ECM

P0015

P0025

With engine warmed up and vehicle being driven, exhaust valve timing does not change for 5 minutes or more in retarded position

(1 trip detection logic)

  • Valve timing

  • OCV for exhaust side (bank 1, 2)

  • OCV filter (bank 1, 2)

  • Camshaft timing exhaust gear assembly

  • ECM

MONITOR DESCRIPTION

The ECM optimizes the exhaust valve timing using the VVT (Variable Valve Timing) system to control the exhaust camshaft. The VVT system includes the ECM, the Oil Control Valve (OCV) and the VVT controller.

The ECM sends a target duty-cycle control signal to the OCV. This control signal regulates the oil pressure supplied to the VVT controller. The VVT controller can advance or retard the exhaust camshaft.

If the difference between the target and actual exhaust valve timing is large, and changes in actual exhaust valve timing are small, the ECM interprets this as the VVT controller stuck malfunction and sets a DTC.

Example:

A DTC is set when the following conditions (1) and (2) are met:

(1) It takes 5 seconds or more to change the valve timing by 5°CA.

(2) After the above condition is met, the OCV is forcibly activated 60 seconds.

DTCs P0014 and P0024 (Advanced Cam Timing) are subject to 2 trip detection logic.

DTCs P0015 and P0025 (Retarded Cam Timing) are subject to 1 trip detection logic.

These DTCs indicate that the VVT controller cannot operate properly due to OCV malfunctions or the presence of foreign objects in the OCV.

WIRING DIAGRAM

Refer to DTC P0013 Click here.

CAUTION / NOTICE / HINT

Tech Tips

Abnormal bank

Advanced timing over

(Valve timing is out of specified range)

Retarded timing over

(Valve timing is out of specified range)
Bank 1 P0014 P0015
Bank 2 P0024 P0025

  • If DTC P0014 or P0015 is displayed, check the bank 1 VVT system for exhaust side circuit.

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

  • If DTC P0024 or P0025 is displayed, check the bank 2 VVT system for exhaust side circuit.

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

  • Read freeze frame data using the intelligent tester. 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.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0014, P0015, P0024 OR P0025)


    1. Connect the intelligent tester to the DLC3.

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

    3. Enter the following menus: Powertrain / Engine / DTC.

    4. Read the DTCs.

      Result
      Display (DTC output) Proceed to
      P0014, P0015, P0024 or P0025 A
      P0014, P0015, P0024 or P0025 and other DTCs B

      Tech Tips

      If any DTCs other than P0014, P0015, P0024 or P0025 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OCV FOR EXHAUST SIDE OPERATION)


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine and turn the tester ON.

    3. Warm up the engine.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT Exhaust Linear (Bank1) or Control the VVT Exhaust Linear (Bank2).

    5. Check the engine speed while operating the Oil Control Valve (OCV) using the tester.

      OK
      Tester Operation Engine Condition
      0% Normal engine speed
      30% Engine idles roughly

    NG

    CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN) Click here

    OK

  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0014, P0015, P0024 OR P0025)


    1. Connect the intelligent tester to the DLC3.

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

    3. Clear DTCs Click here.

    4. Start the engine and warm it up.

    5. With the engine warmed up, idle it for 1 minute. Then drive the vehicle for 5 minutes.

    6. Read DTCs using the tester.

      OK
      No DTC output.

    NG

    GO TO DTC CHART Click here

    OK

    END

  4. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)

    A001DWKE01
    *a Timing Mark

    1. Remove the cylinder head cover bank 1 and bank 2.

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

    3. Rotate the crankshaft pulley and align its notch to timing mark 0 of the timing chain cover. Check that the timing marks of the camshaft timing gears and camshaft timing exhaust gears are at the positions shown in the illustration.

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

    4. Reinstall the cylinder head cover.


    NG

    ADJUST VALVE TIMING Click here

    OK

  5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY


    1. A001DEBE22
      *1 Valve Moves

      Remove the OCV Click here.

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

      Standard resistance
      Tester Condition Condition Specified Connection
      1 - 2 20°C (68°F) 6.9 to 7.9 Ω

    3. Apply the positive battery voltage to terminal 1 and negative battery voltage to terminal 2. Check the valve operation.

      OK
      Valve moves quickly.

    NG

    REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Click here

    OK

  6. INSPECT OIL CONTROL VALVE FILTER


    1. Remove the cylinder head cover sub-assembly Click here.

    2. Remove the OCV filter Click here.

    3. Inspect the OCV filter.

      OK
      Filter is not clogged.

    NG

    REPLACE OIL CONTROL VALVE FILTER Click here

    OK

  7. REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY


    1. Replace the camshaft timing exhaust gear assembly Click here.


    NEXT

  8. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the intelligent tester to the DLC3.

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

    3. Clear DTCs Click here.

    4. Start the engine and warm up.

    5. With the engine warmed up, idle it for 1 minute. Then drive the vehicle for 5 minutes.

    6. Read output DTCs using the intelligent tester.

      OK
      No DTC output.

      Tech Tips

      DTC P0014, P0015, P0024 or P0025 is output when foreign objects in engine oil are caught in some parts of the system. These codes will stay registered even if the system returns to normal after a short time. These foreign objects are then captured by the oil, thus eliminating the source of the problem.


    NG

    REPLACE ECM Click here

    OK

    SYSTEM OK