Subaru 2002 IMPREZA Service Manual page 420

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
AR:DTC PO420
-
CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD
-
DTC DETECTING CONDITION:
TROUBLE SYMPTOM:
Two consecutive driving cycles with fault
Engine stalls.
Idle mixture is out of specifications.
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(D0HC TURBO)-
49, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(D0HC TURBO)-46, Inspec-
tion Mode.>.
WIRING DIAGRAM:
T
i
8:
0
8135 C
:o
8136 D:
0
8137 ECM
I
43
F
1 I
.
EN1151
EN(D0HC TURBO)-I96