Subaru 2005 Impreza Operating and maintenance instructions

GENERAL DESCRIPTION

GD(STi)-2
GENERAL DESCRIPTION
List of Diagnostic Trouble Code (DTC)
1. List of Diagnostic Trouble Code (DTC)
A: LIST
DTC Item Index
P0011 “A” Camshaft Position-Timing Over-
Advanced or System Performance
(Bank 1)
<Ref. to GD(STi)-9, DTC P0011 “A” CAMSHAFT POSITION - TIMING
OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK 1), Diagnostic
Trouble Code (DTC) Detecting Criteria.>
P0021 “A” Camshaft Position-Timing Over-
Advanced or System Performance
(Bank 2)
<Ref. to GD(STi)-11, DTC P0021 “A” CAMSHAFT POSITION - TIMING
OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK 2), Diagnostic
Trouble Code (DTC) Detecting Criteria.>
P0030 HO2S Heater Control Circuit (Bank 1
Sensor 1)
<Ref. to GD(STi)-11, DTC P0030 HO2S HEATER CONTROL CIRCUIT
(BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0031 HO2S Heater Control Circuit Low
(Bank 1 Sensor 1)
<Ref. to GD(STi)-13, DTC P0031 HO2S HEATER CONTROL CIRCUIT
LOW (BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Crite-
ria.>
P0032 HO2S Heater Control Circuit High
(Bank 1 Sensor 1)
<Ref. to GD(STi)-15, DTC P0032 HO2S HEATER CONTROL CIRCUIT
HIGH (BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Crite-
ria.>
P0037 HO2S Heater Control Circuit Low
(Bank 1 Sensor 2)
<Ref. to GD(STi)-17, DTC P0037 HO2S HEATER CONTROL CIRCUIT
LOW (BANK 1 SENSOR 2), Diagnostic Trouble Code (DTC) Detecting Crite-
ria.>
P0038 HO2S Heater Control Circuit High
(Bank 1 Sensor 2)
<Ref. to GD(STi)-19, DTC P0038 HO2S HEATER CONTROL CIRCUIT
HIGH (BANK 1 SENSOR 2), Diagnostic Trouble Code (DTC) Detecting Crite-
ria.>
P0068 MAP/MAF −Throttle Position Corre-
lation
<Ref. to GD(STi)-21, DTC P0068 MAP/MAF −THROTTLE POSITION COR-
RELATION, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0101 Mass or Volume Air Flow Circuit
Range/Performance
<Ref. to GD(STi)-23, DTC P0101 MASS OR VOLUME AIR FLOW CIRCUIT
RANGE/PERFORMANCE, Diagnostic Trouble Code (DTC) Detecting Crite-
ria.>
P0102 Mass or Volume Air Flow Circuit Low
Input
<Ref. to GD(STi)-26, DTC P0102 MASS OR VOLUME AIR FLOW CIRCUIT
LOW INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0103 Mass or Volume Air Flow Circuit High
Input
<Ref. to GD(STi)-28, DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT
HIGH INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0107 Manifold Absolute Pressure/Baro-
metric Pressure Circuit Low Input
<Ref. to GD(STi)-30, DTC P0107 MANIFOLD ABSOLUTE PRESSURE/
BAROMETRIC PRESSURE CIRCUIT LOW INPUT, Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P0108 Manifold Absolute Pressure/Baro-
metric Pressure Circuit High Input
<Ref. to GD(STi)-32, DTC P0108 MANIFOLD ABSOLUTE PRESSURE/
BAROMETRIC PRESSURE CIRCUIT HIGH INPUT, Diagnostic Trouble
Code (DTC) Detecting Criteria.>
P0111 Intake Air Temperature Circuit
Range/Performance
<Ref. to GD(STi)-34, DTC P0111 INTAKE AIR TEMPERATURE CIRCUIT
RANGE/PERFORMANCE, Diagnostic Trouble Code (DTC) Detecting Crite-
ria.>
P0112 Intake Air Temperature Circuit Low
Input
<Ref. to GD(STi)-36, DTC P0112 INTAKE AIR TEMPERATURE CIRCUIT
LOW INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0113 Intake Air Temperature Circuit High
Input
<Ref. to GD(STi)-38, DTC P0113 INTAKE AIR TEMPERATURE CIRCUIT
HIGH INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0117 Engine Coolant Temperature Circuit
Low Input
<Ref. to GD(STi)-40, DTC P0117 ENGINE COOLANT TEMPERATURE
CIRCUIT LOW INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0118 Engine Coolant Temperature Circuit
High Input
<Ref. to GD(STi)-42, DTC P0118 ENGINE COOLANT TEMPERATURE
CIRCUIT HIGH INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0122 Throttle/Pedal Position Sensor/
Switch “A” Circuit Low Input
<Ref. to GD(STi)-44, DTC P0122 THROTTLE/PEDAL POSITION SENSOR/
SWITCH “A” CIRCUIT LOW INPUT, Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P0123 Throttle/Pedal Position Sensor/
Switch “A” Circuit High Input
<Ref. to GD(STi)-46, DTC P0123 THROTTLE/PEDAL POSITION SENSOR/
SWITCH “A” CIRCUIT HIGH INPUT, Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>

GD(STi)-3
GENERAL DESCRIPTION
List of Diagnostic Trouble Code (DTC)
P0125 Insufficient Coolant Temperature for
Closed Loop Fuel Control
<Ref. to GD(STi)-48, DTC P0125 INSUFFICIENT COOLANT TEMPERA-
TURE FOR CLOSED LOOP FUEL CONTROL, Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P0126 Insufficient Engine Coolant Tempera-
ture for Stable Operation
<Ref. to GD(STi)-50, DTC P0126 INSUFFICIENT ENGINE COOLANT TEM-
PERATURE FOR STABLE OPERATION, Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P0128 Coolant Thermostat (Coolant Tem-
perature Below Thermostat Regulat-
ing Temperature)
<Ref. to GD(STi)-52, DTC P0128 COOLANT THERMOSTAT (COOLANT
TEMPERATURE BELOW THERMOSTAT REGULATING TEMPERATURE),
Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0131 O2Sensor Circuit Low Voltage (Bank
1 Sensor 1)
<Ref. to GD(STi)-54, DTC P0131 O2SENSOR CIRCUIT LOW VOLTAGE
(BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0132 O2Sensor Circuit High Voltage
(Bank 1 Sensor 1)
<Ref. to GD(STi)-56, DTC P0132 O2SENSOR CIRCUIT HIGH VOLTAGE
(BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0133 O2Sensor Circuit Slow Response
(Bank 1 Sensor 1)
<Ref. to GD(STi)-58, DTC P0133 O2SENSOR CIRCUIT SLOW
RESPONSE (BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P0134 O2Sensor Circuit No Activity
Detected (Bank 1 Sensor 1)
<Ref. to GD(STi)-61, DTC P0134 O2SENSOR CIRCUIT NO ACTIVITY
DETECTED (BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P0137 O2Sensor Circuit Low Voltage (Bank
1 Sensor 2)
<Ref. to GD(STi)-63, DTC P0137 O2SENSOR CIRCUIT LOW VOLTAGE
(BANK 1 SENSOR 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0138 O2Sensor Circuit High Voltage
(Bank 1 Sensor 2)
<Ref. to GD(STi)-65, DTC P0138 O2SENSOR CIRCUIT HIGH VOLTAGE
(BANK 1 SENSOR 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0139 O2Sensor Circuit Slow Response
(Bank 1 Sensor 2)
<Ref. to GD(STi)-67, DTC P0139 O2SENSOR CIRCUIT SLOW
RESPONSE (BANK 1 SENSOR 2), Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P0171 System too Lean (Bank 1) <Ref. to GD(STi)-72, DTC P0171 SYSTEM TOO LEAN (BANK 1), Diagnos-
tic Trouble Code (DTC) Detecting Criteria.>
P0172 System too Rich (Bank 1) <Ref. to GD(STi)-75, DTC P0172 SYSTEM TOO RICH (BANK 1), Diagnostic
Trouble Code (DTC) Detecting Criteria.>
P0181 Fuel Temperature Sensor “A” Circuit
Range/Performance
<Ref. to GD(STi)-78, DTC P0181 FUEL TEMPERATURE SENSOR “A” CIR-
CUIT RANGE/PERFORMANCE, Diagnostic Trouble Code (DTC) Detecting
Criteria.>
P0182 Fuel Temperature Sensor “A” Circuit
Low Input
<Ref. to GD(STi)-81, DTC P0182 FUEL TEMPERATURE SENSOR “A” CIR-
CUIT LOW INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0183 Fuel Temperature Sensor “A” Circuit
High Input
<Ref. to GD(STi)-83, DTC P0183 FUEL TEMPERATURE SENSOR “A” CIR-
CUIT HIGH INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0222 Throttle/Pedal Position Sensor/
Switch “B” Circuit Low Input
<Ref. to GD(STi)-85, DTC P0222 THROTTLE/PEDAL POSITION SENSOR/
SWITCH “B” CIRCUIT LOW INPUT, Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P0223 Throttle/Pedal Position Sensor/
Switch “B” Circuit High Input
<Ref. to GD(STi)-87, DTC P0223 THROTTLE/PEDAL POSITION SENSOR/
SWITCH “B” CIRCUIT HIGH INPUT, Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P0230 Fuel Pump Primary Circuit <Ref. to GD(STi)-89, DTC P0230 FUEL PUMP PRIMARY CIRCUIT, Diag-
nostic Trouble Code (DTC) Detecting Criteria.>
P0244 Turbo/Super Charger Wastegate
Solenoid “A” Range/Performance
<Ref. to GD(STi)-91, DTC P0244 TURBO/SUPER CHARGER WASTE-
GATE SOLENOID “A” RANGE/PERFORMANCE, Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P0245 Turbo/Super Charger Wastegate
Solenoid “A” Low
<Ref. to GD(STi)-93, DTC P0245 TURBO/SUPER CHARGER WASTE-
GATE SOLENOID “A” LOW, Diagnostic Trouble Code (DTC) Detecting Crite-
ria.>
P0246 Turbo/Super Charger Wastegate
Solenoid “A” High
<Ref. to GD(STi)-95, DTC P0246 TURBO/SUPER CHARGER WASTE-
GATE SOLENOID “A” HIGH, Diagnostic Trouble Code (DTC) Detecting Cri-
teria.>
P0301 Cylinder 1 misfire detected <Ref. to GD(STi)-97, DTC P0301 CYLINDER 1 MISFIRE DETECTED, Diag-
nostic Trouble Code (DTC) Detecting Criteria.>
DTC Item Index

GD(STi)-4
GENERAL DESCRIPTION
List of Diagnostic Trouble Code (DTC)
P0302 Cylinder 2 misfire detected <Ref. to GD(STi)-102, DTC P0302 CYLINDER 2 MISFIRE DETECTED,
Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0303 Cylinder 3 misfire detected <Ref. to GD(STi)-102, DTC P0303 CYLINDER 3 MISFIRE DETECTED,
Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0304 Cylinder 4 misfire detected <Ref. to GD(STi)-102, DTC P0304 CYLINDER 4 MISFIRE DETECTED,
Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0327 Knock Sensor 1 Circuit Low Input
(Bank 1 or Single Sensor)
<Ref. to GD(STi)-103, DTC P0327 KNOCK SENSOR 1 CIRCUIT LOW
INPUT (BANK 1 OR SINGLE SENSOR), Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P0328 Knock Sensor 1 Circuit High Input
(Bank 1 or Single Sensor)
<Ref. to GD(STi)-105, DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH
INPUT (BANK 1 OR SINGLE SENSOR), Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P0335 Crankshaft Position Sensor “A” Cir-
cuit
<Ref. to GD(STi)-107, DTC P0335 CRANKSHAFT POSITION SENSOR “A”
CIRCUIT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0336 Crankshaft Position Sensor “A” Cir-
cuit Range/Performance
<Ref. to GD(STi)-109, DTC P0336 CRANKSHAFT POSITION SENSOR “A”
CIRCUIT RANGE/PERFORMANCE, Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P0340 Camshaft Position Sensor “A” Circuit
(Bank 1 or Single Sensor)
<Ref. to GD(STi)-111, DTC P0340 CAMSHAFT POSITION SENSOR “A”
CIRCUIT (BANK 1 OR SINGLE SENSOR), Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P0345 Camshaft Position Sensor “A” Circuit
(Bank 2)
<Ref. to GD(STi)-112, DTC P0345 CAMSHAFT POSITION SENSOR “A”
CIRCUIT (BANK 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0420 Catalyst System Efficiency Below
Threshold (Bank 1)
<Ref. to GD(STi)-113, DTC P0420 CATALYST SYSTEM EFFICIENCY
BELOW THRESHOLD (BANK 1), Diagnostic Trouble Code (DTC) Detecting
Criteria.>
P0442 Evaporative Emission Control Sys-
tem Leak Detected (small leak)
<Ref. to GD(STi)-116, DTC P0442 EVAPORATIVE EMISSION CONTROL
SYSTEM LEAK DETECTED (SMALL LEAK), Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P0447 Evaporative Emission Control Sys-
tem Vent Control Circuit Open
<Ref. to GD(STi)-141, DTC P0447 EVAPORATIVE EMISSION CONTROL
SYSTEM VENT CONTROL CIRCUIT OPEN, Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P0448 Evaporative Emission Control Sys-
tem Vent Control Circuit Shorted
<Ref. to GD(STi)-143, DTC P0448 EVAPORATIVE EMISSION CONTROL
SYSTEM VENT CONTROL CIRCUIT SHORTED, Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P0451 Evaporative Emission Control Sys-
tem Pressure Sensor Range/Perfor-
mance
<Ref. to GD(STi)-145, DTC P0451 EVAPORATIVE EMISSION CONTROL
SYSTEM PRESSURE SENSOR RANGE/PERFORMANCE, Diagnostic
Trouble Code (DTC) Detecting Criteria.>
P0452 Evaporative Emission Control Sys-
tem Pressure Sensor Low Input
<Ref. to GD(STi)-147, DTC P0452 EVAPORATIVE EMISSION CONTROL
SYSTEM PRESSURE SENSOR LOW INPUT, Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P0453 Evaporative Emission Control Sys-
tem Pressure Sensor High Input
<Ref. to GD(STi)-149, DTC P0453 EVAPORATIVE EMISSION CONTROL
SYSTEM PRESSURE SENSOR HIGH INPUT, Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P0456 Evaporative Emission Control Sys-
tem Leak Detected (very small leak)
<Ref. to GD(STi)-150, DTC P0456 EVAPORATIVE EMISSION CONTROL
SYSTEM LEAK DETECTED (VERY SMALL LEAK), Diagnostic Trouble
Code (DTC) Detecting Criteria.>
P0457 Evaporative Emission Control Sys-
tem Leak Detected (fuel cap loose/
off)
<Ref. to GD(STi)-150, DTC P0457 EVAPORATIVE EMISSION CONTROL
SYSTEM LEAK DETECTED (FUEL CAP LOOSE/OFF), Diagnostic Trouble
Code (DTC) Detecting Criteria.>
P0458 Evaporative Emission Control Sys-
tem Purge Control Valve Circuit Low
<Ref. to GD(STi)-151, DTC P0458 EVAPORATIVE EMISSION CONTROL
SYSTEM PURGE CONTROL VALVE CIRCUIT LOW, Diagnostic Trouble
Code (DTC) Detecting Criteria.>
P0459 Evaporative Emission Control Sys-
tem Purge Control Valve Circuit High
<Ref. to GD(STi)-153, DTC P0459 EVAPORATIVE EMISSION CONTROL
SYSTEM PURGE CONTROL VALVE CIRCUIT HIGH, Diagnostic Trouble
Code (DTC) Detecting Criteria.>
DTC Item Index

GD(STi)-5
GENERAL DESCRIPTION
List of Diagnostic Trouble Code (DTC)
P0461 Fuel Level Sensor Circuit Range/Per-
formance
<Ref. to GD(STi)-155, DTC P0461 FUEL LEVEL SENSOR CIRCUIT
RANGE/PERFORMANCE, Diagnostic Trouble Code (DTC) Detecting Crite-
ria.>
P0462 Fuel Level Sensor Circuit Low Input <Ref. to GD(STi)-157, DTC P0462 FUEL LEVEL SENSOR CIRCUIT LOW
INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0463 Fuel Level Sensor Circuit High Input <Ref. to GD(STi)-159, DTC P0463 FUEL LEVEL SENSOR CIRCUIT HIGH
INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0464 Fuel Level Sensor Circuit Intermittent <Ref. to GD(STi)-161, DTC P0464 FUEL LEVEL SENSOR CIRCUIT INTER-
MITTENT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0483 Cooling Fan Rationality Check <Ref. to GD(STi)-164, DTC P0483 COOLING FAN RATIONALITY CHECK,
Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0502 Vehicle Speed Sensor Circuit Low
Input
<Ref. to GD(STi)-166, DTC P0502 VEHICLE SPEED SENSOR CIRCUIT
LOW INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0503 Vehicle Speed Sensor Intermittent/
Erratic/High
<Ref. to GD(STi)-168, DTC P0503 VEHICLE SPEED SENSOR INTERMIT-
TENT/ERRATIC/HIGH, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0506 Idle Control System RPM Lower
Than Expected
<Ref. to GD(STi)-170, DTC P0506 IDLE CONTROL SYSTEM RPM LOWER
THAN EXPECTED, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0507 Idle Control System RPM Higher
Than Expected
<Ref. to GD(STi)-172, DTC P0507 IDLE CONTROL SYSTEM RPM HIGHER
THAN EXPECTED, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0512 Starter Request Circuit <Ref. to GD(STi)-174, DTC P0512 STARTER REQUEST CIRCUIT, Diag-
nostic Trouble Code (DTC) Detecting Criteria.>
P0513 Incorrect Immobilizer Key <Ref. to GD(STi)-175, DTC P0513 INCORRECT IMMOBILIZER KEY, Diag-
nostic Trouble Code (DTC) Detecting Criteria.>
P0519 Idle Control System Malfunction
(Fail-Safe)
<Ref. to GD(STi)-176, DTC P0519 IDLE CONTROL SYSTEM MALFUNC-
TION (FAIL-SAFE), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0604 Internal Control Module Random
Access Memory (RAM) Error
<Ref. to GD(STi)-178, DTC P0604 INTERNAL CONTROL MODULE RAN-
DOM ACCESS MEMORY (RAM) ERROR, Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P0605 Internal Control Module Read Only
Memory (ROM) Error
<Ref. to GD(STi)-180, DTC P0605 INTERNAL CONTROL MODULE READ
ONLY MEMORY (ROM) ERROR, Diagnostic Trouble Code (DTC) Detecting
Criteria.>
P0607 Control Module Performance <Ref. to GD(STi)-181, DTC P0607 CONTROL MODULE PERFORMANCE,
Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0638 Throttle Actuator Control Range/Per-
formance (Bank 1)
<Ref. to GD(STi)-184, DTC P0638 THROTTLE ACTUATOR CONTROL
RANGE/PERFORMANCE (BANK 1), Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P0691 Cooling Fan 1 Control Circuit Low <Ref. to GD(STi)-187, DTC P0691 COOLING FAN 1 CONTROL CIRCUIT
LOW, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0692 Cooling Fan 1 Control Circuit High <Ref. to GD(STi)-188, DTC P0692 COOLING FAN 1 CONTROL CIRCUIT
HIGH, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0851 Neutral Switch Input Circuit Low <Ref. to GD(STi)-189, DTC P0851 NEUTRAL SWITCH INPUT CIRCUIT
LOW, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P0852 Neutral Switch Input Circuit High <Ref. to GD(STi)-190, DTC P0852 NEUTRAL SWITCH INPUT CIRCUIT
HIGH, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P1152 O2Sensor Circuit Range/Perfor-
mance (Low) (Bank1 Sensor1)
<Ref. to GD(STi)-191, DTC P1152 O2SENSOR CIRCUIT RANGE/PER-
FORMANCE (LOW) (BANK1 SENSOR1), Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P1153 O2Sensor Circuit Range/Perfor-
mance (High) (Bank1 Sensor1)
<Ref. to GD(STi)-194, DTC P1153 O2SENSOR CIRCUIT RANGE/PER-
FORMANCE (HIGH) (BANK1 SENSOR1), Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P1160 Return Spring Failure <Ref. to GD(STi)-197, DTC P1160 RETURN SPRING FAILURE, Diagnostic
Trouble Code (DTC) Detecting Criteria.>
P1400 Fuel Tank Pressure Control Solenoid
Valve Circuit Low
<Ref. to GD(STi)-199, DTC P1400 FUEL TANK PRESSURE CONTROL
SOLENOID VALVE CIRCUIT LOW, Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
DTC Item Index

GD(STi)-6
GENERAL DESCRIPTION
List of Diagnostic Trouble Code (DTC)
P1420 Fuel Tank Pressure Control Sol.
Valve Circuit High
<Ref. to GD(STi)-201, DTC P1420 FUEL TANK PRESSURE CONTROL
SOL. VALVE CIRCUIT HIGH, Diagnostic Trouble Code (DTC) Detecting Cri-
teria.>
P1443 Vent Control Solenoid Valve Function
Problem
<Ref. to GD(STi)-202, DTC P1443 VENT CONTROL SOLENOID VALVE
FUNCTION PROBLEM, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P1446 Fuel Tank Sensor Control Valve Cir-
cuit Low
<Ref. to GD(STi)-203, DTC P1446 FUEL TANK SENSOR CONTROL
VALVE CIRCUIT LOW, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P1447 Fuel Tank Sensor Control Valve Cir-
cuit High
<Ref. to GD(STi)-205, DTC P1447 FUEL TANK SENSOR CONTROL
VALVE CIRCUIT HIGH, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P1448 Fuel Tank Sensor Control Valve
Range/Performance
<Ref. to GD(STi)-207, DTC P1448 FUEL TANK SENSOR CONTROL
VALVE RANGE/PERFORMANCE, Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P1491 Positive Crankcase Ventilation (Blow-
by) Function Problem
<Ref. to GD(STi)-210, DTC P1491 POSITIVE CRANKCASE VENTILATION
(BLOW-BY) FUNCTION PROBLEM, Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P1518 Starter Switch Circuit Low Input <Ref. to GD(STi)-212, DTC P1518 STARTER SWITCH CIRCUIT LOW
INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P1560 Back-Up Voltage Circuit Malfunction <Ref. to GD(STi)-213, DTC P1560 BACK-UP VOLTAGE CIRCUIT MAL-
FUNCTION, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P1570 Antenna <Ref. to GD(STi)-214, DTC P1570 ANTENNA, Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P1571 Reference Code Incompatibility <Ref. to GD(STi)-214, DTC P1571 REFERENCE CODE INCOMPATIBILITY,
Diagnostic Trouble Code (DTC) Detecting Criteria.>
P1572 IMM Circuit Failure (Except Antenna
Circuit)
<Ref. to GD(STi)-214, DTC P1572 IMM CIRCUIT FAILURE (EXCEPT
ANTENNA CIRCUIT), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P1574 Key Communication Failure <Ref. to GD(STi)-214, DTC P1574 KEY COMMUNICATION FAILURE, Diag-
nostic Trouble Code (DTC) Detecting Criteria.>
P1576 EGI Control Module EEPROM <Ref. to GD(STi)-214, DTC P1576 EGI CONTROL MODULE EEPROM,
Diagnostic Trouble Code (DTC) Detecting Criteria.>
P1577 IMM Control Module EEPROM <Ref. to GD(STi)-214, DTC P1577 IMM CONTROL MODULE EEPROM,
Diagnostic Trouble Code (DTC) Detecting Criteria.>
P1578 Meter Failure <Ref. to GD(STi)-214, DTC P1578 METER FAILURE, Diagnostic Trouble
Code (DTC) Detecting Criteria.>
P2004 Intake Manifold Runner Control
Stuck Open (Bank 1)
<Ref. to GD(STi)-215, DTC P2004 INTAKE MANIFOLD RUNNER CON-
TROL STUCK OPEN (BANK 1), Diagnostic Trouble Code (DTC) Detecting
Criteria.>
P2005 Intake Manifold Runner Control
Stuck Open (Bank 2)
<Ref. to GD(STi)-216, DTC P2005 INTAKE MANIFOLD RUNNER CON-
TROL STUCK OPEN (BANK 2), Diagnostic Trouble Code (DTC) Detecting
Criteria.>
P2006 Intake Manifold Runner Control
Stuck Closed (Bank 1)
<Ref. to GD(STi)-217, DTC P2006 INTAKE MANIFOLD RUNNER CON-
TROL STUCK CLOSED (BANK 1), Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P2007 Intake Manifold Runner Control
Stuck Closed (Bank 2)
<Ref. to GD(STi)-218, DTC P2007 INTAKE MANIFOLD RUNNER CON-
TROL STUCK CLOSED (BANK 2), Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P2008 Intake Manifold Runner Control Cir-
cuit / Open (Bank 1)
<Ref. to GD(STi)-219, DTC P2008 INTAKE MANIFOLD RUNNER CON-
TROL CIRCUIT / OPEN (BANK 1), Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P2009 Intake Manifold Runner Control Cir-
cuit Low (Bank 1)
<Ref. to GD(STi)-221, DTC P2009 INTAKE MANIFOLD RUNNER CON-
TROL CIRCUIT LOW (BANK 1), Diagnostic Trouble Code (DTC) Detecting
Criteria.>
P2011 Intake Manifold Runner Control Cir-
cuit / Open (Bank 2)
<Ref. to GD(STi)-223, DTC P2011 INTAKE MANIFOLD RUNNER CON-
TROL CIRCUIT / OPEN (BANK 2), Diagnostic Trouble Code (DTC) Detect-
ing Criteria.>
P2012 Intake Manifold Runner Control Cir-
cuit Low (Bank 2)
<Ref. to GD(STi)-225, DTC P2012 INTAKE MANIFOLD RUNNER CON-
TROL CIRCUIT LOW (BANK 2), Diagnostic Trouble Code (DTC) Detecting
Criteria.>
DTC Item Index

GD(STi)-7
GENERAL DESCRIPTION
List of Diagnostic Trouble Code (DTC)
P2016 Intake Manifold Runner Position Sen-
sor/Switch Circuit Low (Bank 1)
<Ref. to GD(STi)-227, DTC P2016 INTAKE MANIFOLD RUNNER POSI-
TION SENSOR/SWITCH CIRCUIT LOW (BANK 1), Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P2017 Intake Manifold Runner Position Sen-
sor/Switch Circuit High (Bank 1)
<Ref. to GD(STi)-229, DTC P2017 INTAKE MANIFOLD RUNNER POSI-
TION SENSOR/SWITCH CIRCUIT HIGH (BANK 1), Diagnostic Trouble
Code (DTC) Detecting Criteria.>
P2021 Intake Manifold Runner Position Sen-
sor/Switch Circuit Low (Bank 2)
<Ref. to GD(STi)-231, DTC P2021 INTAKE MANIFOLD RUNNER POSI-
TION SENSOR/SWITCH CIRCUIT LOW (BANK 2), Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P2022 Intake Manifold Runner Position Sen-
sor/Switch Circuit High (Bank 2)
<Ref. to GD(STi)-233, DTC P2022 INTAKE MANIFOLD RUNNER POSI-
TION SENSOR/SWITCH CIRCUIT HIGH (BANK 2), Diagnostic Trouble
Code (DTC) Detecting Criteria.>
P2088 OCV Solenoid Valve Signal A Circuit
Open (Bank 1)
<Ref. to GD(STi)-235, DTC P2088 OCV SOLENOID VALVE SIGNAL A CIR-
CUIT OPEN (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P2089 OCV Solenoid Valve Signal A Circuit
Short (Bank 1)
<Ref. to GD(STi)-237, DTC P2089 OCV SOLENOID VALVE SIGNAL A CIR-
CUIT SHORT (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P2092 OCV Solenoid Valve Signal A Circuit
Open (Bank 2)
<Ref. to GD(STi)-239, DTC P2092 OCV SOLENOID VALVE SIGNAL A CIR-
CUIT OPEN (BANK 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P2093 OCV Solenoid Valve Signal A Circuit
Short (Bank 2)
<Ref. to GD(STi)-241, DTC P2093 OCV SOLENOID VALVE SIGNAL A CIR-
CUIT SHORT (BANK 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P2096 Post Catalyst Fuel Trim System Too
Lean Bank 1
<Ref. to GD(STi)-243, DTC P2096 POST CATALYST FUEL TRIM SYSTEM
TOO LEAN BANK 1, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P2097 Post Catalyst Fuel Trim System Too
Rich Bank 1
<Ref. to GD(STi)-245, DTC P2097 POST CATALYST FUEL TRIM SYSTEM
TOO RICH BANK 1, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P2101 Throttle Actuator Control Motor Cir-
cuit Range/Performance
<Ref. to GD(STi)-247, DTC P2101 THROTTLE ACTUATOR CONTROL
MOTOR CIRCUIT RANGE/PERFORMANCE, Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P2102 Throttle Actuator Control Motor Cir-
cuit Low
<Ref. to GD(STi)-249, DTC P2102 THROTTLE ACTUATOR CONTROL
MOTOR CIRCUIT LOW, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P2103 Throttle Actuator Control Motor Cir-
cuit High
<Ref. to GD(STi)-251, DTC P2103 THROTTLE ACTUATOR CONTROL
MOTOR CIRCUIT HIGH, Diagnostic Trouble Code (DTC) Detecting Crite-
ria.>
P2109 Throttle/Pedal Position Sensor A
Minimum Stop Performance
<Ref. to GD(STi)-253, DTC P2109 THROTTLE/PEDAL POSITION SENSOR
A MINIMUM STOP PERFORMANCE, Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P2122 Throttle/Pedal Position Sensor/
Switch “D” Circuit Low Input
<Ref. to GD(STi)-255, DTC P2122 THROTTLE/PEDAL POSITION SEN-
SOR/SWITCH “D” CIRCUIT LOW INPUT, Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P2123 Throttle/Pedal Position Sensor/
Switch “D” Circuit High Input
<Ref. to GD(STi)-257, DTC P2123 THROTTLE/PEDAL POSITION SEN-
SOR/SWITCH “D” CIRCUIT HIGH INPUT, Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P2127 Throttle/Pedal Position Sensor/
Switch “E” Circuit Low Input
<Ref. to GD(STi)-259, DTC P2127 THROTTLE/PEDAL POSITION SEN-
SOR/SWITCH “E” CIRCUIT LOW INPUT, Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P2128 Throttle/Pedal Position Sensor/
Switch “E” Circuit High Input
<Ref. to GD(STi)-261, DTC P2128 THROTTLE/PEDAL POSITION SEN-
SOR/SWITCH “E” CIRCUIT HIGH INPUT, Diagnostic Trouble Code (DTC)
Detecting Criteria.>
P2135 Throttle/Pedal Position Sensor/
Switch “A”/“B” Voltage Rationality
<Ref. to GD(STi)-263, DTC P2135 THROTTLE/PEDAL POSITION SEN-
SOR/SWITCH “A” / “B” VOLTAGE RATIONALITY, Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P2138 Throttle/Pedal Position Sensor/
Switch “D”/“E” Voltage Rationality
<Ref. to GD(STi)-265, DTC P2138 THROTTLE/PEDAL POSITION SEN-
SOR/SWITCH “D” / “E” VOLTAGE RATIONALITY, Diagnostic Trouble Code
(DTC) Detecting Criteria.>
P2227 Barometric Pressure Circuit Range/
Performance
<Ref. to GD(STi)-267, DTC P2227 BAROMETRIC PRESSURE CIRCUIT
RANGE/PERFORMANCE, Diagnostic Trouble Code (DTC) Detecting Crite-
ria.>
DTC Item Index

GD(STi)-8
GENERAL DESCRIPTION
List of Diagnostic Trouble Code (DTC)
P2228 Barometric Pressure Circuit Low
Input
<Ref. to GD(STi)-268, DTC P2228 BAROMETRIC PRESSURE CIRCUIT
LOW INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
P2229 Barometric Pressure Circuit High
Input
<Ref. to GD(STi)-269, DTC P2229 BAROMETRIC PRESSURE CIRCUIT
HIGH INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
DTC Item Index

GD(STi)-9
GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria
2. Diagnostic Trouble Code (DTC) Detecting Criteria
A: DTC P0011 “A” CAMSHAFT POSITION - TIMING OVER-ADVANCED OR SYS-
TEM PERFORMANCE (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of AVCS system.
Judge NG when the amount of AVCS actual timing advance does not approach to the amount of AVCS target
timing advance.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION (FOR ABNORMALITY JUDGMENT ONLY)
4. GENERAL DRIVING CYCLE
Always perform the diagnosis after idling when the amount of AVCS target timing advance is equal to 0.
5. DIAGNOSTIC METHOD
Judge NG when the difference of the amount of AVCS target timing advance and the amount of AVCS actual
timing advance becomes large, and judge OK when the difference becomes small.
(1) AVCS timing controller
(2) Vane
(3) Engine control module (ECM)
(4) Oil flow control valve
(5) Oil pressure
Secondary Parameters Enable Conditions
Battery voltage ≥10.9 V
Engine speed ≥600 rpm
Engine coolant temperature ≥60°C
Amount of AVCS target timing advance = 0°CA
EN-01852
(3)
(4)
(1)
(5)
(2)

GD(STi)-10
GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria
• Abnormality Judgment
Judge NG when the continuous time of completing the malfunction criteria below becomes more than 10 sec-
onds.
Judgment Value
Time Needed for Diagnosis: 10 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
• Normality Judgment
Judge OK and clear the NG when the continuous time of completing the malfunction criteria below becomes
more than 3 seconds.
Judgment Value
6. DTC CLEAR CONDITION
• When the OK idling cycle was completed 40 times in a row
• When “Clear Memory” was performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle was completed 3 times in a row
• When “Clear Memory” was performed
8. FAIL SAFE
• Ignition timing whole learning compensation:
– Enter the initial value (whole learning compensation factor = 0.5, Variable amount of whole learning
compensation factor = 0.25) to the whole learning compensation factor and variable amount of whole
learning compensation factor when IG OFF, and then make the whole learning incomplete.
– Enter the initial value (whole learning compensation factor = 0.5, Variable amount of whole learning
compensation factor = 0.25) to the whole learning compensation factor and variable amount of whole
learning compensation factor when making a normality judgment from abnormality judgment, and then
make the whole learning incomplete.
• Ignition timing partial learning compensation:
– Enter the initial value (0°CA) to the compensation value of partial learning zone when IG OFF.
– Enter the initial value (0°CA) to the compensation value of partial learning zone when making a normal-
ity judgment from abnormality judgment.
• AVCS control: Most timing retard learning is not complete or most timing retard learning completion is not
experienced.
• ISC feedback compensation: Do not perform the AVCS actual timing advance compensation. Make the
OCV driving Duty to be the given value (9.36%).
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Malfunction Criteria Threshold Value
AVCS target position −AVCS actual
position
≥20°
Malfunction Criteria Threshold Value
AVCS control During feedback
Amount of AVCS target timing advance 5 — 30°CA
AVCS target position −AVCS actual
position
<10°

GD(STi)-11
GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria
B: DTC P0021 “A” CAMSHAFT POSITION - TIMING OVER-ADVANCED OR SYS-
TEM PERFORMANCE (BANK 2)
1. OUTLINE OF DIAGNOSIS
For the diagnostic procedure, refer to DTC P0011. <Ref. to GD(STi)-9, DTC P0011 “A” CAMSHAFT POSI-
TION - TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK 1), Diagnostic Trouble Code
(DTC) Detecting Criteria.>
C: DTC P0030 HO2S HEATER CONTROL CIRCUIT (BANK 1 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of front oxygen (A/F) sensor heater.
Judge NG when impedance of front oxygen (A/F) sensor is larger than the standard value by referring to the
engine condition such as fuel shut-off in deceleration, etc.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Perform diagnosis continuously in 60 seconds after starting engine.
(1) Protection tube
(2) Gasket
(3) Sensor housing
(4) Ceramic heater
Secondary Parameters Enable Conditions
Time needed for all secondary parame-
ters to be in enable conditions
60 seconds or more
Battery voltage >10.9 V
After fuel shut-off 20 seconds or more
Front oxygen (A/F) sensor heater control
duty ≥70%
Experienced
EN-01763
(1)
(2)
(3)
(4)

GD(STi)-12
GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria
5. DIAGNOSTIC METHOD
Judge NG when the continuous time of completing the malfunction criteria below becomes more than the
time needed for diagnosis (10 seconds). Judge OK and clear NG when the continuous time of not completing
the malfunction criteria below becomes more than the time needed for diagnosis (10 seconds).
Judgment Value
Time Needed for Diagnosis: 10 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
6. DTC CLEAR CONDITION
• When the OK idling cycle was completed 40 times in a row
• When “Clear Memory” was performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle was completed 3 times in a row
• When “Clear Memory” was performed
8. FAIL SAFE
• Front oxygen (A/F) sensor main learning correction: Not allowed to calculate
• Correction when re-starting at high temperature: Normally minimum value 0.3 →0
• Purge control: Not allowed to purge
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Malfunction Criteria Threshold Value
Impedance of front oxygen (A/F) sensor >50 Ω

GD(STi)-13
GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria
D: DTC P0031 HO2S HEATER CONTROL CIRCUIT LOW (BANK 1 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of heater.
The heater conducts the duty control. The output terminal voltage at ON becomes 0 V, and the output termi-
nal voltage at OFF becomes battery voltage.
Judge NG when the terminal voltage remains to be Low.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Always perform diagnosis continuously.
5. DIAGNOSTIC METHOD
• Abnormality Judgment
Judge NG when the continuous time of completing the malfunction criteria below becomes more than 1 sec-
ond (8 cycles).
Judgment Value
Time Needed for Diagnosis: 1 second
Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.
(A) Battery voltage
(B) Front oxygen (A/F) sensor heater output voltage
(C) 128 milliseconds
(D) Low abnormality
Secondary Parameters Enable Conditions
Battery voltage ≥10.9 V
Malfunction Criteria Threshold Value
Output voltage level Low
Front oxygen (A/F) sensor heater control
duty
<87.5%
EN-01792
(C)
(A)
(B)
ON
OFF
0V
(D)

GD(STi)-14
GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria
• Normality Judgment
Judge OK and clear the NG when all the malfunction criteria below are completed.
Judgment Value
6. DTC CLEAR CONDITION
• When the OK idling cycle was completed 40 times in a row
• When “Clear Memory” was performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle was completed 3 times in a row
• When “Clear Memory” was performed
8. FAIL SAFE
• Front oxygen (A/F) sensor activation judgment: Front oxygen (A/F) sensor full activation is not complete,
or front oxygen (A/F) sensor half activation is not complete.
• A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
• Compensation when starting the engine at high temperature: Make the MIN value to be 0 from 0.3 normal-
ly.
• Purge control: Not allowed to purge.
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Malfunction Criteria Threshold Value
Output voltage level High

GD(STi)-15
GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria
E: DTC P0032 HO2S HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of heater.
The heater conducts the duty control. The output terminal voltage at ON becomes 0 V, and the output termi-
nal voltage at OFF becomes battery voltage.
Judge NG when the terminal voltage remains to be High.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Always perform diagnosis continuously.
5. DIAGNOSTIC METHOD
• Abnormality Judgment
Judge NG when the continuous time of completing the malfunction criteria below becomes 1 second (8 cy-
cles).
Judgment Value
Time Needed for Diagnosis: 1 second
Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.
(A) Battery voltage
(B) Front oxygen (A/F) sensor heater output voltage
(C) 128 milliseconds
(D) High abnormality
Secondary Parameters Enable Conditions
Battery voltage ≥10.9 V
Malfunction Criteria Threshold Value
Output voltage level High
Front oxygen (A/F) sensor heater control
duty
≥12.5%
EN-01793
(C)
(A)
(B)
ON
OFF
0V
(D)

GD(STi)-16
GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria
• Normality Judgment
Judge OK and clear the NG when all the malfunction criteria below are completed.
Judgment Value
6. DTC CLEAR CONDITION
• When the OK idling cycle was completed 40 times in a row
• When “Clear Memory” was performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle was completed 3 times in a row
• When “Clear Memory” was performed
8. FAIL SAFE
• Front oxygen (A/F) sensor activation judgment: Front oxygen (A/F) sensor full activation is not complete,
or front oxygen (A/F) sensor half activation is not complete.
• A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
• Compensation when starting the engine at high temperature: Make the MIN value to be 0 from 0.3 normal-
ly.
• Purge control: Not allowed to purge.
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Malfunction Criteria Threshold Value
Output voltage level Low

GD(STi)-17
GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria
F: DTC P0037 HO2S HEATER CONTROL CIRCUIT LOW (BANK 1 SENSOR 2)
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of rear oxygen sensor heater.
Rear oxygen sensor heater conducted the duty control, and the output terminal voltage at ON is 0 V and the
output terminal voltage at OFF is the battery voltage.
Judge NG when the terminal voltage remains to be Low.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously in 1 second after engine starting.
5. DIAGNOSTIC METHOD
• Abnormality Judgment
Judge NG when the continuous time of completing all the malfunction criteria below becomes more than
2,560 millisecond (10 cycles).
Judgment Value
Time Needed for Diagnosis: 2.56 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
(A) Battery voltage
(B) Rear oxygen sensor heater output voltage
(C) 256 milliseconds (cycles)
(D) Low malfunction
Secondary Parameters Enable Conditions
Battery voltage >10.9 V
Elapsed time after engine starting ≥1 second
Malfunction Criteria Threshold Value
Output voltage level Low
Rear oxygen sensor heater control duty <75%
EN-01792
(C)
(A)
(B)
ON
OFF
0V
(D)

GD(STi)-18
GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria
• Normality Judgment
Judge OK and clear the NG when all the malfunction criteria below are completed.
Judgment Value
6. DTC CLEAR CONDITION
• When the OK idling cycle was completed 40 times in a row
• When “Clear Memory” was performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle was completed 3 times in a row
• When “Clear Memory” was performed
8. FAIL SAFE
Sub feedback control: Not allowed
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Malfunction Criteria Threshold Value
Output voltage level High

GD(STi)-19
GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria
G: DTC P0038 HO2S HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 2)
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of rear oxygen heater.
Rear oxygen heater conducted the duty control, and the output terminal voltage at ON is 0 V and the output
terminal voltage at OFF is the battery voltage.
Judge NG when the terminal voltage remains to be High.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously in 1 second after engine starting.
5. DIAGNOSTIC METHOD
• Abnormality Judgment
Judge NG when the continuous time of completing all the malfunction criteria below becomes more than
2,560 milliseconds (10 cycles).
Judgment Value
Time Needed for Diagnosis: 2.56 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
(A) Battery voltage
(B) Rear oxygen sensor heater output voltage
(C) 256 milliseconds (cycle)
(D) High malfunction
Secondary Parameters Enable Conditions
Battery voltage >10.9 V
Elapsed time after engine starting ≥21 second
Malfunction Criteria Threshold Value
Output voltage level High
Rear oxygen sensor heater control duty ≥25%
EN-01793
(C)
(A)
(B)
ON
OFF
0V
(D)

GD(STi)-20
GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria
• Normality Judgment
Judge OK and clear the NG when all the malfunction criteria below are completed.
Judgment Value
6. DTC CLEAR CONDITION
• When the OK idling cycle was completed 40 times in a row
• When “Clear Memory” was performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle was completed 3 times in a row
• When “Clear Memory” was performed
8. FAIL SAFE
Sub feedback control: Not allowed
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Malfunction Criteria Threshold Value
Output voltage level Low