DTC P0018: Crankshaft Position - Camshaft Position Correlation Bank 2 Sensor A: Notes

DTC detecting condition: 

Detected when two consecutive driving cycles with fault occur.

Trouble symptom: 

• Engine stall
• Improper idling

Wiring diagram: 

Engine Electrical System Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>ENGINE ELECTRICAL SYSTEM .

Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .

Is DTC other than P0018 displayed? (Current malfunction)

Yes  : Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Ref. to ENGINE (DIAGNOSTICS) (H4DO (HEV))>DIAGNOSTIC TROUBLE CODE (DTC) .

No  : Save the freeze frame data. Ref. to COMMON (DIAG)>FREEZE FRAME DATA .

Go to  2.

1. Turn the ignition switch to OFF.
2. Check the engine oil condition.
   NOTE: Check the following items.

   • Within the specified range in amount
   • Excessively dirty
   • Coagulated by additives
   • Use of oil of specified viscosity

   Is the check result OK?

   Yes  : Go to  3.

   No  : Adjust the oil amount, or replace the engine oil and engine oil filter. Ref. to LUBRICATION (H4DO (EXCEPT FOR HEV))>ENGINE OIL>REPLACEMENT . Ref. to LUBRICATION (H4DO (EXCEPT FOR HEV))>OIL FILTER .

   Go to  3.

1. Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
2. Turn the ignition switch to OFF.
3. Disconnect the connector of the intake oil control solenoid LH. (DTC will be set but this will not effect the inspection)
4. Turn the ignition switch to ON.
5. Navigate to Inspection Mode for measuring Exhaust Gas. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>WORK SUPPORT>OPERATION>SERVICE MODE .
   NOTE: If it is necessary to run the engine for 10 minutes or more, fasten the driver's seat belt.
6. Using the Subaru Select Monitor, start monitoring of [VVT Adv. Ang. Amount L] of the data monitor.
   NOTE: For detailed operation procedures, refer to "Common (Diagnostics)". Ref. to COMMON (DIAG)>DATA MONITOR .
7. Read [VVT Adv. Ang. Amount L] within 10 seconds after engine is started.
   NOTE: The display will indicate [0] by judging the position as standard after 10 seconds elapse since the engine was started.
8. Record the readings [VVT Adv. Ang. Amount L].
9. Stop the engine.

   Is [VVT Adv. Ang. Amount L] out of standard (0 [deg]) by ±10 [deg] or more within 10 seconds after starting?

   Yes  : Repair the timing chain. Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>TIMING CHAIN ASSEMBLY .

   Go to  15.

   No  : Go to  4.

1. Replace the intake oil control solenoid LH. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (HEV))>OIL CONTROL SOLENOID .
2. Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
3. Perform the inspection mode AP. Ref. to ENGINE (DIAGNOSTICS) (H4DO (HEV))>INSPECTION MODE>PROCEDURE>INSPECTION MODE AP .
4. Using the Subaru Select Monitor or general scan tool, read the values in [VVT monitor bank 1] and [VVT monitor bank 2] according to the reading out procedure of MODE$06. Ref. to ENGINE (DIAGNOSTICS) (H4DO (HEV))>GENERAL SCAN TOOL>OPERATION>MODE $06 (REQUEST ON-BOARD MONITORING TEST RESULTS FOR INTERMITTENTLY MONITORED SYSTEMS) .
   CAUTION:

   • Performing inspection mode needs a driver along with a checker who should check the data.
   • When performing inspection mode on a public road, pay sufficient attention to the traffic condition and give the highest priority to road safety.
   NOTE:

   • Perform the inspection mode again without stopping the engine because the diagnosis is not completed yet when the diagnostic value indicates 0.
   • Keep on checking the data during inspection mode because the diagnostic value is repeatedly updated.
5. Record the readings [VVT monitor bank 1] and [VVT monitor bank 2].

   Is the value of [VVT monitor bank 2] of the replaced oil control solenoid 1000 or more?

   Yes  : Go to  6.

   No  : Go to  5.

Compare the values of [VVT monitor bank 1] and [VVT monitor bank 2] recorded in step 4.

Is the value of [VVT monitor bank 2] 1000 or less, and more than (value of [VVT monitor bank 1] x 1.5 + 100) compared with the value of [VVT monitor bank 1]?

Yes  : Go to  6.

No  : Idle the engine for 5 minutes, and then replace the oil filter and engine oil (flushing). Ref. to LUBRICATION (H4DO (EXCEPT FOR HEV))>ENGINE OIL>REPLACEMENT . Ref. to LUBRICATION (H4DO (EXCEPT FOR HEV))>OIL FILTER .

Go to  15.

Check for a bend, damage and poor contact of harness and connector.

Is the check result OK?

Yes  : Go to  7.

No  : Repair or replace faulty parts. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (HEV))>ENGINE CONTROL MODULE (ECM) . Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (HEV))>OIL CONTROL SOLENOID . Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (HEV))>CAMSHAFT POSITION SENSOR . Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (HEV))>CRANKSHAFT POSITION SENSOR .

Go to  7.

1. Turn the ignition switch to OFF.
2. Disconnect the connector from ECM.
3. Disconnect the connector from the intake oil control solenoid LH.
4. Measure the resistance between intake oil control solenoid LH connector and ECM connector.

   Connector & terminal 

   (E158) No. 100 - (E37) No. 2:

   Is the resistance less than 1 Ω?

   Yes  : Go to  8.

   No  : Repair or replace faulty parts.

   Go to  15.

1. Turn the ignition switch to OFF.
2. Disconnect the connector from ECM.
3. Disconnect the connector from intake camshaft position sensor LH.
4. Measure the resistance between the intake camshaft position sensor LH connector and ECM connector.

   Connector & terminal 

   (E158) No. 77 - (E35) No. 2:

   Is the resistance less than 1 Ω?

   Yes  : Go to  9.

   No  : Repair or replace faulty parts.

   Go to  15.

1. Turn the ignition switch to OFF.
2. Disconnect the connector from ECM.
3. Disconnect the connector from the crankshaft position sensor.
4. Measure the resistance between the crankshaft position sensor connector and ECM connector.

   Connector & terminal 

   (E158) No. 66 - (E10) No. 1:

   Is the resistance less than 1 Ω?

   Yes  : Go to  10.

   No  : Repair or replace faulty parts.

   Go to  15.

Check the engine oil pressure. Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>ENGINE OIL PRESSURE>INSPECTION .

Is the check result OK?

Yes  : Go to  12.

No  : Go to  11.

Check the oil strainer. Ref. to LUBRICATION (H4DO (EXCEPT FOR HEV))>OIL PAN>INSPECTION .

Does any foreign matter exist at the oil strainer in the oil pan?

Yes  : Check and clean inside the oil strainer.

Go to  12.

No  : Replace the chain cover. Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>CHAIN COVER .

Go to  13.

1. Remove the engine from the vehicle. Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>ENGINE ASSEMBLY>REMOVAL .
2. Check the oil path of the chain cover. Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>CHAIN COVER>INSPECTION .
   NOTE: Check the O-rings in the following oil path and also check that no foreign matter exists.

   • Inlet of oil pump
   • Outlet of oil pump
   • Each O-ring in the path leading to left/right cylinder head
   • Oil control solenoid
   • Foreign matter exists

   Is the check result OK?

   Yes  : Go to  13.

   No  : Replace faulty parts. If there is any foreign matter, replace the chain cover. Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>CHAIN COVER .

   Go to  13.

1. Remove the timing chain. Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>TIMING CHAIN ASSEMBLY>REMOVAL .
2. Rotate the camshaft by hand to compare the rotational resistance of the four.
   NOTE: Check the following items if there is a clearly faulty condition in the camshaft (bank 2) such as restriction or rotational resistance by comparing it with the rotational resistance of the camshaft (bank 1).

   • Foreign matter attached to camshaft
   • Damage of camshaft (scratching, galling, wear, etc.)
   • Check for consequence from improper rotation of cam journal bearing

   Is the check result OK?

   Yes  : Go to  14.

   No  : Replace the cam carrier and camshaft. Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>CAM CARRIER . Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>CAMSHAFT . Go to  14.

Visually check the following parts of the oil passage from the oil pump to the oil control solenoid to check obvious defectiveness such as foreign matter, clogging, etc.

• Oil passage in cam Carrier
• Oil passage on cylinder head side
• Oil passage at the joint between cam sprocket and camshaft
• Oil passage at the back of sprocket and the end of camshaft when the sprocket is removed
  NOTE: Refer to removal procedure of cam carrier in service information. Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>CAM CARRIER>REMOVAL .

  Is the check result OK?

  Yes  : Replace the sprocket. Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>CAM SPROCKET .

  CAUTION:

  • Overuse of liquid gasket may cause a malfunction when installing the chain cover. Use one specified in the service information with an appropriate amount (line diameter) of application. Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>CHAIN COVER>INSTALLATION .
  • Make sure that the insertion amount of oil filter matches the surface of cam carrier. (Do not over-insert) Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>CAM CARRIER>ASSEMBLY .

  Go to  15.

  No  : Remove the foreign matter. Replace the cam carrier oil filter (reuse not allowed). Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>CAM CARRIER .

  CAUTION:

  • Overuse of liquid gasket may cause a malfunction when installing the chain cover. Use one specified in the service information with an appropriate amount (line diameter) of application. Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>CHAIN COVER>INSTALLATION .
  • Make sure that the insertion amount of oil filter matches the surface of cam carrier. (Do not over-insert) Ref. to MECHANICAL (H4DO (EXCEPT FOR HEV))>CAM CARRIER>ASSEMBLY .
  NOTE: After servicing, idle the engine for 5 minutes, and then replace the oil filter and engine oil (flushing). Ref. to LUBRICATION (H4DO (EXCEPT FOR HEV))>ENGINE OIL>REPLACEMENT . Ref. to LUBRICATION (H4DO (EXCEPT FOR HEV))>OIL FILTER .

  Go to  15.

1. Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
2. Turn the ignition switch to ON.
3. Using the Subaru Select Monitor, read the data monitor.
   NOTE: For detailed operation procedures, refer to "Common (Diagnostics)". Ref. to COMMON (DIAG)>DATA MONITOR .
4. Read the current value of [VVT Adv. Ang. Amount L].
5. Find the sum value of read [VVT Adv. Ang. Amount L] and [VVT Adv. Ang. Amount L] recorded in step 3.

   Standard:

   45deg - 74deg

   Is the sum value within standard?

   Yes  : ECM is good; finish the diagnosis.

   No  : Replace the ECM and perform inspection mode AP. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (HEV))>ENGINE CONTROL MODULE (ECM) . Ref. to ENGINE (DIAGNOSTICS) (H4DO (HEV))>INSPECTION MODE . When DTC is not displayed, end the diagnosis.