Subaru 2002 IMPREZA Service Manual page 549

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE
(Dl
AG
NOSTl CS)
Step
1
CHECK ANY OTHER DTC ON DISPLAY.
Check
Does the Subaru Select Moni-
tor or OBD-ll general scan tool
indicate DTC P0545, PO546 or
P 1 544?
Yes
Inspect DTC
P0545, PO546 or
P1544 using "List
of Diagnostic Trou-
ble Code (DTC)".
<Ref. to EN(D0HC
TURBO)-80, List
of Diagnostic Trou-
ble Code (DTC).>
NOTE:
In this case, it is
not necessary tc
inspect DTC
P1312.
No
Replace the
exhaust gas tem-
perature sensor.
<Ref. to FU(D0HC
Exhaust Tempera-
ture Sensor.>
TURBO)-46,
EN(D0HC TURBO)-325