Subaru IMPREZA 2002 Service Manual page 402

LIST OF DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
PO123 Throttle position sensor circuit high
input
Insufficient coolant temperature for
closed loop fuel control
PO1 28 Thermostat malfunction
PO130
PO1 25
Front oxygen (NF) sensor circuit
range/performance problem (Lean)
Front oxygen (NF) sensor circuit
malfunction (open circuit)
Front oxygen (NF) sensor circuit
malfunction (short circuit)
Front oxygen (NF) sensor circuit
slow response
Rear oxygen sensor circuit malfunc-
tion
Rear oxygen sensor circuit slow
response
Fuel trim malfunction (NF too Lean)
Fuel trim malfunction ( N F too Rich)
Fuel temperature sensor A circuit
range/performance problem
Fuel temperature sensor A circuit low
input
PO1 31
PO1 32
PO133
PO136
PO1 39
PO1 71
PO172
PO1 81
PO1 82
I
"Ic,
NO.
I
<Ref. to EN(S0HC)-132, DTC PO123 -THROTTLE POSITION SENSOR
CIRCUIT HIGH INPUT -, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
<Ref. to EN(S0HC)-134, DTC PO125
-
INSUFFICIENT COOLANT TEM-
PERATURE FOR CLOSED LOOP FUEL CONTROL
-,
Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-136, DTC PO128 -THERMOSTAT MALFUNCTION
-
, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-138, DTC PO130
-
FRONT OXYGEN (NF) SENSOR
CIRCUIT RANGE/PERFORMANCE PROBLEM (LEAN) -, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-142, DTC PO131 - FRONT OXYGEN (NF) SENSOR
CIRCUIT MALFUNCTION (OPEN CIRCUIT) -, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-144, DTC PO132
-
FRONT OXYGEN (NF) SENSOR
CIRCUIT MALFUNCTION (SHORT CIRCUIT) -, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-146, DTC PO133
-
FRONT OXYGEN (NF) SENSOR
CIRCUIT SLOW RESPONSE
-,
Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
<Ref. to EN(S0HC)-148, DTC PO136
-
REAR OXYGEN SENSOR CIR-
CUIT MALFUNCTION
-,
Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
<Ref. to EN(S0HC)-152, DTC PO139
-
REAR OXYGEN SENSOR CIR-
CUlT SLOW RESPONSE
-,
Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
<Ref. to EN(S0HC)-154, DTC PO171
-
FUEL TRIM MALFUNCTION (NF
TOO LEAN) -, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-154, DTC PO172
-
FUEL TRIM MALFUNCTION (NF
TOO RICH) -, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-156, DTC PO181
-
FUEL TEMPERATURE SENSOR A
CIRCUIT RANGE/PERFORMANCE PROBLEM -, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-158, DTC PO182
-
FUELTEMPERATURE SENSOR A
CIRCUIT LOW INPUT -, Diagnostic Procedure with Diagnostic Trouble
Code ( D T C b
Item
PO1 83
PO301
PO302
PO303
Index
Fuel temperature sensor A circuit
high input
Cylinder 1 misfire detected
Cylinder 2 misfire detected
Cylinder 3 misfire detected
<Ref. to EN(S0HC)-160, DTC PO183
-
FUEL TEMPERATURE SENSOR A
CIRCUIT HIGH INPUT -, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
<Ref. to EN(S0HC)-163, DTC PO301 -CYLINDER 1 MISFIRE DETECTED
-, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-163, DTC PO302 - CYLINDER 2 MISFIRE DETECTED
-, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-163, DTC PO303
-
CYLINDER 3 MISFIRE DETECTED
-,
Diagnostic Procedure with Diaanostic Trouble Code ( D T C b
PO304
PO327
PO328
PO335
Cylinder 4 misfire detected
Knock sensor circuit low input
Knock sensor circuit high input
Crankshaft position sensor circuit
malfunction
<Ref. to EN(S0HC)-164, DTC P0304- CYLINDER 4 MISFIRE DETECTED
-, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-170, DTC PO327 - KNOCK SENSOR CIRCUIT LOW
INPUT
-,
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-172, DTC PO328
-
KNOCK SENSOR CIRCUIT HIGH
INPUT
-,
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
<Ref. to EN(S0HC)-174, DTC PO335
-
CRANKSHAFT POSITION SEN-
SOR CIRCUIT MALFUNCTION -, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
EN(S0HC)-78