Home/Subaru/Impreza/Subaru Impreza GD/GC/GG facelift (2002-2005)/Repair manual/Testing & Diagnostics
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Repair manual
Testing & Diagnostics Subaru Impreza GD/GC/GG facelift
Step-by-step instructions on "Testing & Diagnostics" for Subaru Impreza GD/GC/GG facelift (2002–2005). Pick an article — removal, installation, adjustment and diagnostics with illustrations.
5subsections
127articles
272illustrations
Engine Controls - Basic Diagnostic Procedures
2 articlesEngine Controls - Trouble Shooting - No Codes
2 articlesEngine Controls - System & Component Testing
4 articlesEngine Controls - Self-Diagnostics - 2.5L
4 articlesSelf-Diagnostics - 2.0L
115 articles- Self-Diagnostics - 2.0L: Overview
- Self-Diagnostics - 2.0L: Diagnosis 19
- Self-Diagnostics - 2.0L: Component Locations 1
- Self-Diagnostics - 2.0L: Other 5
- DTC P0030: FRONT HEATED OXYGEN SENSOR (HO2S) CONTROL CIRCUIT, MALFUNCTION 2
- DTC P0031: FRONT HEATED OXYGEN SENSOR (HO2S) HEATER CIRCUIT, LOW INPUT 2
- DTC P0032: FRONT HO2S HEATER CIRCUIT, HIGH INPUT 1
- DTC P0037: REAR HO2S HEATER CIRCUIT, MALFUNCTION 3
- DTC P0038: REAR HO2S HEATER CIRCUIT, HIGH OUTPUT 1
- DTC P0068: INTAKE MANIFOLD/BAROMETRIC PRESSURE SENSOR CIRCUIT, RANGE PERFORMANCE PROBLEM 2
- DTC P0101: MASS AIR FLOW CIRCUIT, RANGE/PERFORMANCE 2
- DTC P0102: MASS AIR FLOW CIRCUIT, LOW INPUT 2
- DTC P0103: MASS AIR FLOW CIRCUIT, HIGH INPUT 1
- DTC P0107: INTAKE MANIFOLD/BAROMETRIC PRESSURE SENSOR CIRCUIT, LOW INPUT 2
- DTC P0108: INTAKE AIR TEMPERATURE & PRESSURE SENSOR CIRCUIT, HIGH INPUT 2
- DTC P0111: INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT, RANGE/PERFORMANCE PROBLEM 1
- DTC P0112: INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT, LOW INPUT 1
- DTC P0113: INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT, HIGH INPUT 2
- DTC P0117: ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT, LOW INPUT 2
- DTC P0118: ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT, HIGH INPUT 2
- DTC P0121: THROTTLE POSITION (TP) SENSOR CIRCUIT, RANGE/PERFORMANCE PROBLEM 2
- DTC P0122: THROTTLE POSITION (TP) SENSOR CIRCUIT, LOW INPUT 2
- DTC P0123: THROTTLE POSITION (TP) SENSOR CIRCUIT, HIGH INPUT 1
- DTC P0125: ENGINE COOLANT TEMPERATURE TOO LOW FOR CLOSED LOOP FUEL CONTROL 1
- DTC P0128: THERMOSTAT MALFUNCTION 1
- DTC P0129: BAROMETRIC PRESSURE TOO LOW 1
- DTC P0130: FRONT HO2S CIRCUIT, RANGE/PERFORMANCE PROBLEM 1
- DTC P0133: FRONT HO2S CIRCUIT, SLOW RESPONSE 1
- DTC P0137: REAR HO2S CIRCUIT, LOW INPUT 2
- DTC P0138 REAR HO2S CIRCUIT, HIGH INPUT 2
- DTC P0139: REAR HO2S CIRCUIT, SLOW RESPONSE 1
- DTC P0172: FUEL TRIM MALFUNCTION (TOO RICH) 3
- DTC P0181: FUEL TEMPERATURE SENSOR "A" CIRCUIT, RANGE/PERFORMANCE PROBLEM 2
- DTC P0182: FUEL TEMPERATURE SENSOR "A" CIRCUIT, LOW INPUT 1
- DTC P0183: FUEL TEMPERATURE SENSOR "A" CIRCUIT, HIGH INPUT 2
- DTC P0230: FUEL PUMP PRIMARY CIRCUIT 3
- DTC P0244: TURBOCHARGER WASTEGATE SOLENOID "A" RANGE/PERFORMANCE 2
- DTC P0245: TURBOCHARGER WASTEGATE SOLENOID "A" LOW 2
- DTC P0246: TURBOCHARGER WASTEGATE SOLENOID "A" HIGH 1
- DTC P0301, P0302, P0303 & P0304: CYLINDERS NO. 1-4 MISFIRE DETECTED 5
- DTC P0327: KNOCK SENSOR (KS) CIRCUIT, LOW INPUT 2
- DTC P0328: KNOCK SENSOR (KS) CIRCUIT, HIGH INPUT 1
- DTC P0335: CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT, MALFUNCTION 2
- DTC P0336: CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT, RANGE/PERFORMANCE PROBLEM 1
- DTC P0340: CAMSHAFT POSITION (CMP) SENSOR CIRCUIT, MALFUNCTION 2
- DTC P0341: CAMSHAFT POSITION (CMP) SENSOR CIRCUIT, RANGE/PERFORMANCE PROBLEM 2
- DTC P0420: CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD 2
- DTC P0442: EVAP SYSTEM PURGE CONTROL VALVE CIRCUIT, MALFUNCTION 3
- DTC P0447: EVAP SYSTEM VENT CONTROL CIRCUIT, LOW INPUT 3
- DTC P0448: EVAP SYSTEM VENT CONTROL CIRCUIT, HIGH INPUT 1
- DTC P0451: EVAP SYSTEM PRESSURE SENSOR RANGE/PERFORMANCE PROBLEM 2
- DTC P0452: EVAP SYSTEM PRESSURE SENSOR LOW INPUT 3
- DTC P0453: EVAP SYSTEM PRESSURE SENSOR HIGH INPUT 3
- DTC P0456: EVAP SYSTEM MALFUNCTION 2
- DTC P0457: EVAP SYSTEM LEAK DETECTED (FUEL CAP LOOSE/OFF) 2
- DTC P0458: EVAP SYSTEM PURGE CONTROL VALVE CIRCUIT, LOW INPUT 3
- DTC P0459: EVAP SYSTEM PURGE CONTROL VALVE CIRCUIT, HIGH INPUT 2
- DTC P0461: FUEL LEVEL SENSOR CIRCUIT, RANGE/PERFORMANCE PROBLEM 2
- DTC P0462: FUEL LEVEL SENSOR CIRCUIT, LOW INPUT 2
- DTC P0463: FUEL LEVEL SENSOR CIRCUIT, HIGH INPUT 2
- DTC P0464: FUEL LEVEL SENSOR INTERMITTENT INPUT 1
- DTC P0483: COOLING FAN FUNCTION PROBLEM 2
- DTC P0502: VEHICLE SPEED SENSOR CIRCUIT, LOW INPUT 2
- DTC P0503: VEHICLE SPEED SENSOR INTERMITTENT/ERRATIC/HIGH 1
- DTC P0506: IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED 2
- DTC P0507: IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED 1
- DTC P0508: IDLE CONTROL SYSTEM CIRCUIT, LOW 1
- DTC P0509: IDLE CONTROL SYSTEM CIRCUIT, HIGH 1
- DTC P0512: STARTER REQUEST CIRCUIT 2
- DTC P0519: IDLE AIR CONTROL CIRCUIT, SYSTEM PERFORMANCE 1
- DTC P0545: EXHAUST GAS TEMPERATURE SENSOR CIRCUIT, LOW (BANK 1) 2
- DTC P0546: EXHAUST GAS TEMPERATURE SENSOR HIGH (BANK 1) 2
- DTC P0565: CRUISE CONTROL ON SIGNAL 2
- DTC P0604: INTERNAL CONTROL MODULE MEMORY CHECK SUM ERROR 2
- DTC P0691: COOLING FAN 1 CONTROL CIRCUIT, LOW INPUT 2
- DTC P0692: COOLING FAN 1 CONTROL CIRCUIT, HIGH INPUT 1
- DTC P0703: BRAKE SWITCH INPUT MALFUNCTION 2
- DTC P0734: GEAR 4 INCORRECT RATIO (A/T) 1
- DTC P0741: TORQUE CONVERTER CLUTCH CIRCUIT, PERFORMANCE OR STUCK OFF (A/T) 2
- DTC P0851: NEUTRAL SWITCH INPUT CIRCUIT, LOW (A/T) 2
- DTC P0851: NEUTRAL SWITCH INPUT CIRCUIT, LOW (M/T) 2
- DTC P0852: NEUTRAL SWITCH INPUT CIRCUIT, HIGH (A/T) 2
- DTC P0852: NEUTRAL SWITCH INPUT CIRCUIT, HIGH (M/T) 2
- DTC P0864: TCM COMMUNICATION CIRCUIT, RANGE/PERFORMANCE 2
- DTC P0865: TCM COMMUNICATION CIRCUIT, LOW INPUT 1
- DTC P0866: TCM COMMUNICATION CIRCUIT, HIGH INPUT 1
- DTC P1086: TUMBLE GENERATED VALVE POSITION SENSOR 2 CIRCUIT, LOW 3
- DTC P1087: TUMBLE GENERATED VALVE POSITION SENSOR 2 CIRCUIT, HIGH 1
- DTC P1088: TUMBLE GENERATED VALVE POSITION SENSOR 1 CIRCUIT, LOW 3
- DTC P1089: TUMBLE GENERATED VALVE POSITION SENSOR 1 HIGH 1
- DTC P1090: TUMBLE GENERATED VALVE SYSTEM 1 (VALVE OPEN) 1
- DTC P1091: TUMBLE GENERATED VALVE SYSTEM 1 (VALVE CLOSE)
- DTC P1092: TUMBLE GENERATED VALVE SYSTEM 2 (VALVE OPEN)
- DTC P1093: TUMBLE GENERATED VALVE SYSTEM 2 (VALVE CLOSE)
- DTC P1094: TUMBLE GENERATED VALVE SIGNAL 1 CIRCUIT, MALFUNCTION (OPEN) 2
- DTC P1095: TUMBLE GENERATED VALVE SIGNAL 1 CIRCUIT, MALFUNCTION (SHORT) 1
- DTC P1096: TUMBLE GENERATED VALVE SIGNAL 2 CIRCUIT, MALFUNCTION (OPEN) 2
- DTC P1097: TUMBLE GENERATED VALVE SIGNAL 2 CIRCUIT, MALFUNCTION (SHORT) 1
- DTC P1110: ATMOSPHERIC PRESSURE SENSOR CIRCUIT, LOW INPUT 1
- DTC P1111: ATMOSPHERIC PRESSURE SENSOR CIRCUIT, HIGH INPUT 1
- DTC P1134: FRONT HO2S MICRO-COMPUTER PROBLEM 1
- DTC P1152: OXYGEN SENSOR CIRCUIT, RANGE/PERFORMANCE LOW (FRONT SENSOR, BANK 1) 1
- DTC P1153: OXYGEN SENSOR CIRCUIT, RANGE/PERFORMANCE HIGH (FRONT SENSOR, BANK 1) 2
- DTC P1400: FUEL TANK PRESSURE CONTROL SOLENOID VALVE CIRCUIT, LOW INPUT 3
- DTC P1420: FUEL TANK PRESSURE CONTROL SOLENOID VALVE CIRCUIT, HIGH INPUT 2
- DTC P1443: EVAP SYSTEM VENT CONTROL FUNCTION PROBLEM 2
- DTC P1446: FUEL TANK SENSOR CONTROL VALVE CIRCUIT, LOW INPUT 3
- DTC P1447: FUEL TANK SENSOR CONTROL VALVE CIRCUIT, HIGH INPUT 1
- DTC P1448: FUEL TANK SENSOR CONTROL VALVE RANGE/PERFORMANCE PROBLEM 1
- DTC P1544: EXHAUST TEMPERATURE TOO HIGH 1
- DTC P1560: BACK-UP VOLTAGE CIRCUIT, MALFUNCTION 2
- DTC P1698: ENGINE TORQUE CONTROL CUT SIGNAL CIRCUIT, LOW INPUT 2
- DTC P1699: ENGINE TORQUE CONTROL CUT SIGNAL CIRCUIT, HIGH INPUT 1
- DTC P1711: ENGINE TORQUE CONTROL SIGNAL NO. 1 CIRCUIT, MALFUNCTION (A/T) 2
- DTC P1712: ENGINE TORQUE CONTROL SIGNAL NO. 2 CIRCUIT, MALFUNCTION (A/T) 2