DTC P0021 Intake Camshaft Position Timing - Over-Advanced (Bank 2)

WARNING: This page is about a different variant/trim than selected.

DTC DETECTING CONDITION:

Two consecutive driving cycles with fault
GENERAL DESCRIPTION < Ref. to DTC P0021 INTAKE CAMSHAFT POSITION TIMING - OVER-ADVANCED (BANK 2) , Diagnostic Trouble Code (DTC) Detecting Criteria. >

TROUBLE SYMPTOM:

Engine stalls.
Erroneous idling

CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode < Ref. to , OPERATION , Clear Memory Mode.> and Inspection Mode < Ref. to , PROCEDURE , Inspection Mode.>.

DIAGNOSTIC PROCEDURE (DTC P0021)

Step		Check	Yes	No
1 CHECK FOR ANY OTHER DTC ON DISPLAY.		Is any other DTC displayed?	Inspect the relevant DTC using "List of Diagnostic Trouble Code (DTC)". < Ref. to , LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >	Go to step 2.
2 CHECK CURRENT DATA. Start the engine and let it idle. Inspect the VVT advance timing and OCV duty output using Subaru Select Monitor or OBD-II general scan tool. NOTE: Subaru Select Monitor For detailed operation procedure, refer to the "READ CURRENT DATA FOR ENGINE". < Ref. to , SUBARU SELECT MONITOR . > OBD-II general scan tool For detailed operation procedures, refer to the OBD-II general scan tool instruction manual .		Is the VVT advance timing more than approx. 0°C and the OCV duty output more than approx. 10%?	Inspect the following items and repair or replace if necessary. Engine oil (amount, contamination) Oil pipe (clog) Oil flow control solenoid valve (clog or contamination in oil passage, settling at spring, stuck at valve) Intake camshaft (sludge, damage at camshaft) Timing belt (timing mark aligning)	A temporary malfunction. Conduct the following to clean the oil passage. Replace the engine oil and idle the engine for 5 minutes, then replace the oil filter and engine oil.