Subaru IMPREZA 2002 Service Manual page 476

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Z:
DTC DETECTING CONDITION:
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(S0HC)-43, OP-
ERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(SOHC)40, OPERATION, Inspec-
tion Mode.>.
WIRING DIAGRAM:
DTC PO139
-
REAR OXYGEN SENSOR CIRCUIT SLOW RESPONSE
-
Two consecutive driving cycles with fault
SBF-5
- 0
e -
x"
EN1083
EN(SOHC)-152