1995 SUBARU LEGACY Service Repair Manual

Page 1377 of 2248

SUBARU LEGACY 1995  Service Repair Manual OBD0199
J: DTC P0130
—FRONT OXYGEN SENSOR CIRCUIT
MALFUNCTION (FO2
—V)—
OBD0200A
DESCRIPTION:
The oxygen sensor is used to sense oxygen concentra-
tion in the exhaust gas. If the fuel ratio is

Page 1378 of 2248

SUBARU LEGACY 1995  Service Repair Manual The difference in oxygen concentration changes greatly
in the vicinity of the optimum air-fuel ratio, and hence the
change in the electromotive force is also large. By inputting
this information into

Page 1379 of 2248

SUBARU LEGACY 1995  Service Repair Manual 1.Check for other causes affecting exhaust gas.
2.Check front oxygen sensor data.
3.Check harness connector.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION M

Page 1380 of 2248

SUBARU LEGACY 1995  Service Repair Manual WIRING DIAGRAM:
RHD model
B2M0450
1CHECK FOR OTHER CAUSES AFFECTING
EXHAUST GAS.
: Is CO % more than 2 % after engine warm-
up?
: Check fuel system.
NOTE:
Check for use of improper fuel.
Check if eng

Page 1381 of 2248

SUBARU LEGACY 1995  Service Repair Manual OBD0145A
2
CHECK FRONT OXYGEN SENSOR DATA.
1) Turn ignition switch to OFF.
2) Connect the Subaru Select Monitor or the OBD-II gen-
eral scan tool to data link connector.
3) Start engine and Turn the S

Page 1382 of 2248

SUBARU LEGACY 1995  Service Repair Manual OBD0705A
3
CHECK HARNESS CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from front oxygen sensor.
3) Turn ignition switch to ON.
4) Measure voltage between front oxygen sensor harn

Page 1383 of 2248

SUBARU LEGACY 1995  Service Repair Manual OBD0209
K: DTC P0133
—FRONT OXYGEN SENSOR CIRCUIT SLOW
RESPONSE (FO2
—R)—
DESCRIPTION:
Refer to“J: DTC P0130—FRONT OXYGEN SENSOR
CIRCUIT MALFUNCTION—[T11J0]”.
DTC DETECTING CONDITION:
T

Page 1384 of 2248

SUBARU LEGACY 1995  Service Repair Manual WIRING DIAGRAM:
LHD model
OBD0201
178
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code