Table of Contents
Advertisement
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
B: DTC P0021 INTAKE CAMSHAFT POSITION-TIMING OVER-ADVANCED OR
SYSTEM PERFORMANCE (BANK2)
DTC DETECTING CONDITION:
Detects when malfunction occurs in 2 continuous driving cycles.
TROUBLE SYMPTOM:
• Engine stalls.
• Erroneous idling
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6DO)(diag)-41,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-34, Inspection
Mode.>.
Step
1
CHECK ANY OTHER DTC ON DISPLAY.
2
CHECK CURRENT DATA.
1) Start the engine and let it idle.
2) Check the AVCS system operating angle
and oil flow control solenoid valve duty output
using Subaru Select Monitor or general scan
tool.
NOTE:
• Subaru Select Monitor
For detailed operation procedure, refer to
"READ CURRENT DATA FOR ENGINE". <Ref.
to EN(H6DO)(diag)-26, Subaru Select Moni-
tor.>
• General scan tool
For detailed operation procedure, refer to the
general scan tool operation manual.
Check
Is any other DTC displayed?
Is the AVCS system operating
angle approx. 0 deg., and oil
flow control solenoid valve duty
output approx. 10%?
EN(H6DO)(diag)-73
ENGINE (DIAGNOSTICS)
Yes
Inspect the rele-
Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H6DO)(diag)-
66, List of Diag-
nostic Trouble
Code (DTC).>
Check the follow-
A temporary mal-
ing and repair or
function. Perform
replace if neces-
the following, and
sary.
clean the oil rout-
• Engine oil
ing.
(amount, dirt)
Replace the
• Oil pipe (clog)
engine oil and idle
• Oil flow con-
the engine for 5
trol solenoid
minutes, and then
valve (clog or
replace the oil filter
dirt of oil rout-
and engine oil.
ing, setting of
spring, clog of
valve)
• Intake cam-
shaft (dirt, dam-
age of
camshaft)
• Timing chain
(matching of
timing mark)
No
Advertisement
Chapters
Table of Contents
