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 vehicle being driven, exhaust valve timing does not change for 5 minutes or more in advanced position (2 trip detection logic)	Valve timing Camshaft oil control valve (OCV) (for Bank 1, 2) Oil control valve (OCV) filter (for Bank 1, 2) Camshaft timing exhaust gear assembly (for Bank 1, 2) 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 Bank 1, 2) OCV filter (for Bank 1, 2) Camshaft timing exhaust gear assembly (for Bank 1, 2) ECM

DTC No.

DTC Detection Condition

Trouble Area

P0014

P0024

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

(2 trip detection logic)

Valve timing
Camshaft oil control valve (OCV) (for Bank 1, 2)
Oil control valve (OCV) filter (for Bank 1, 2)
Camshaft timing exhaust gear assembly (for Bank 1, 2)
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 Bank 1, 2)
OCV filter (for Bank 1, 2)
Camshaft timing exhaust gear assembly (for Bank 1, 2)
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 Camshaft 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), (2) and (3) are met:

(1) The difference between the target and actual exhaust valve timing is more than 5°CA (Crankshaft Angle) and the condition continues for more than 4.5 seconds.

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

(3) After above conditions (1) and (2) are met, the OCV is forcibly activated 63 times or more.

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.

The monitor will not run unless the following conditions are met:

The engine is warm (the engine coolant temperature is 75°C (167°F) or more).
The vehicle has been driven at more than 64 km/h (40 mph) for 3 minutes.
The engine has idled for 3 minutes (retarded angle side only).

WIRING DIAGRAM

Refer to DTC P0013 Click here.

INSPECTION PROCEDURE

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

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.
When viewed from the rear of the engine assembly, Bank 1 is on the left side and Bank 2 is on the right side.

PROCEDURE

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

Connect the intelligent tester to the DLC3.
Turn the power switch on (IG) and turn the tester ON.
Enter the following menus: Powertrain / Engine and ECT / DTC.

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.

GO TO DTC CHART Click here

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VVT EXHAUST LINEAR)

Put the engine in inspection mode Click here.
Connect the intelligent tester to the DLC3.
Turn the tester ON.
Warm up the engine.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank1) or Control the VVT Exhaust Linear (Bank2).

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

OK
Tester Operation	Engine Condition
0%	Normal engine speed
127%	Engine idles roughly

Click here

CHECK WHETHER DTC OUTPUT RECURS (DTC P0014, P0015, P0024 OR P0025)
1. Connect the intelligent tester to the DLC3.
2. Turn the power switch on (IG).
3. Turn the tester ON.
4. Clear DTCs Click here.
5. Turn the power switch off and wait for at least 30 seconds.
6. Turn the power switch on (IG) and turn the intelligent tester on.
7. Put the engine in inspection mode (maintenance mode) Click here.
8. With the engine warmed up, idle it for 1 minute. Then drive the vehicle for 5 minutes.
9. Read DTCs using the tester.
  
  OK
  
  No DTC output.
NG
Click here

OK

END
CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)
1. Remove the cylinder head cover sub-assembly (for Bank 1 and Bank 2) Click here.
2. Turn the crankshaft pulley, and align its groove with the timing mark "0" of the timing chain cover.
3. 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 sub-assembly (for Bank 1 and Bank 2) Click here.
NG
ADJUST VALVE TIMING Click here

OK

OK
No DTC output.

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

INSPECT CAMSHAFT OIL CONTROL VALVE ASSEMBLY (for Bank 1 or Bank 2)

Remove the OCV (for Bank 1 or Bank 2) Click here.

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

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

OK

Valve moves quickly.

OK
Valve moves quickly.

REPLACE CAMSHAFT OIL CONTROL VALVE ASSEMBLY (for Bank 1 or Bank 2) Click here

INSPECT OIL CONTROL VALVE FILTER (for Bank 1 or Bank 2)
1. Remove the cylinder head cover sub-assembly (for Bank 1 or Bank 2) Click here.
2. Remove the OCV filter (for Bank 1 or Bank 2) Click here.
3. Inspect the OCV filter.
  
  OK
  
  Filter is not clogged.
NG
REPLACE OIL CONTROL VALVE FILTER (for Bank 1 or Bank 2) Click here

OK
REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY (for Bank 1 or Bank 2)
1. Replace the camshaft timing exhaust gear assembly (for Bank 1 or Bank 2) Click here.
NEXT
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
1. Connect the intelligent tester to the DLC3.
2. Turn the power switch on (IG).
3. Turn the tester ON.
4. Clear DTCs Click here.
5. Turn the power switch off and wait for at least 30 seconds.
6. Turn the power switch on (IG) and turn the intelligent tester on.
7. Put the engine in inspection mode (maintenance mode) Click here.
8. With the engine warmed up, idle it for 1 minute. Then drive the vehicle for 5 minutes.
9. 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