Subaru 2002 IMPREZA Service Manual page 375

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step Check
1
CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Moni-
tor or OBD-ll general scan
tool
indicate DTC PO136?
Yes
Inspect DTC
PO1 36 using "List
of Diagnostic Trou-
ble Code (DTC)".
<Ref. to EN(D0HC
TURBO)-80, List
No
Replace the rear
oxygen sensor.
<Ref. to FU(D0HC
TURBO)-44, Rear
Oxygen Sensor.>
of Diagnostic Trou-
ble Code (DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
PO1 39.
EN(D0HC TURBO)-151