Subaru Legacy 2002 Service Manual page 676

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
1 CHECK ANY OTHER DTC ON DISPLAY.
Step
Does the Subaru Select
Monitor or OBD-II general
scan tool indicate DTC
P0106, P0107, P0108,
P0117, P0118 or P0125?
EN-159
Check Yes
Inspect DTC
P0106, P0107,
P0108, P0117,
P0118 or P0125
using "17. List of
Diagnostic
Trouble Code
(DTC)". <Ref. to
EN-82, List of
Diagnostic
Trouble Code
(DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
P0301, P0302,
P0303 and
P0304.
Engine (Diagnostics)
B2M4713
No
Go to step 2.