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Repair manual
Testing & Diagnostics Subaru Legacy BE/BH/BT
Step-by-step instructions on "Testing & Diagnostics" for Subaru Legacy BE/BH/BT (1998–2004). Pick an article — removal, installation, adjustment and diagnostics with illustrations.
4subsections
142articles
55illustrations
Engine Controls - Basic Diagnostic Procedures
3 articlesEngine Controls - Self-Diagnostics - 2.2L & 2.5L
133 articles- Engine Controls - Self-Diagnostics - 2.2L & 2.5L: Overview
- Engine Controls - Self-Diagnostics - 2.2L & 2.5L: Diagnosis 4
- Engine Controls - Self-Diagnostics - 2.2L & 2.5L: Component Locations 2
- Engine Controls - Self-Diagnostics - 2.2L & 2.5L: Other 2
- DTC P0032: FRONT HO2S HEATER CIRCUIT HIGH INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P0037: REAR HO2S HEATER CIRCUIT MALFUNCTION - LEGACY & OUTBACK 2.5L A/T 1
- DTC P0038: REAR HO2S HEATER CIRCUIT HIGH OUTPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P0065: AIR ASSIST INJECTOR SOLENOID VALVE CIRCUIT MALFUNCTION - LEGACY & OUTBACK 2.5L A/T
- DTC P0066: AIR ASSIST INJECTOR SOLENOID VALVE CIRCUIT LOW INPUT - LEGACY & OUTBACK 2.5L A/T 1
- DTC P0067: AIR ASSIST INJECTOR SOLENOID VALVE CIRCUIT HIGH INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P0106: INTAKE AIR TEMPERATURE & PRESSURE SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P0106: INTAKE MANIFOLD PRESSURE SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0107: INTAKE AIR TEMPERATURE & PRESSURE SENSOR CIRCUIT LOW INPUT - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T 1
- DTC P0107: INTAKE MANIFOLD PRESSURE SENSOR CIRCUIT LOW INPUT - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT 1
- DTC P0108: INTAKE AIR TEMPERATURE & PRESSURE SENSOR CIRCUIT HIGH INPUT - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P0108: INTAKE MANIFOLD PRESSURE SENSOR CIRCUIT HIGH INPUT - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0111: INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P0111: INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0112: INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT LOW INPUT - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P0112: INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT LOW INPUT - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0113: INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT HIGH INPUT - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P0113: INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT HIGH INPUT - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0116: ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT LOW INPUT - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0117: ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT HIGH INPUT - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT 1
- DTC P0117: ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT LOW INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P0118: ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT HIGH INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P0121: THROTTLE POSITION (TP) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P0121: THROTTLE POSITION (TP) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0122: THROTTLE POSITION (TP) SENSOR CIRCUIT LOW INPUT
- DTC P0123: THROTTLE POSITION (TP) SENSOR CIRCUIT HIGH INPUT
- DTC P0125: ENGINE COOLANT TEMPERATURE TOO LOW FOR CLOSED LOOP FUEL CONTROL
- DTC P0128: THERMOSTAT MALFUNCTION - LEGACY & OUTBACK 2.5L A/T
- DTC P0130: FRONT HO2S CIRCUIT RANGE/PERFORMANCE PROBLEM - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P0131: FRONT HO2S CIRCUIT RANGE/PERFORMANCE PROBLEM (LOW INPUT) - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0131: FRONT HO2S CIRCUIT MALFUNCTION (OPEN CIRCUIT) - LEGACY & OUTBACK 2.5L A/T
- DTC P0132: FRONT HO2S CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0132: FRONT HO2S CIRCUIT MALFUNCTION (SHORT CIRCUIT) - LEGACY & OUTBACK 2.5L A/T
- DTC P0133: FRONT HO2S CIRCUIT SLOW RESPONSE
- DTC P0136: REAR HO2S CIRCUIT MALFUNCTION
- DTC P0139: REAR HO2S CIRCUIT SLOW RESPONSE
- DTC P0141: REAR HO2S HEATER CIRCUIT MALFUNCTION/LOW INPUT - FORESTER & IMPREZA 2.5L
- DTC P0141: REAR HO2S HEATER CIRCUIT MALFUNCTION/LOW INPUT - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0170: FUEL TRIM MALFUNCTION - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P0171: FUEL TRIM MALFUNCTION (TOO LEAN) - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0172: FUEL TRIM MALFUNCTION (TOO RICH) - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0181: FUEL TEMPERATURE SENSOR "A" CIRCUIT RANGE/PERFORMANCE PROBLEM
- DTC P0182: FUEL TEMPERATURE SENSOR "A" CIRCUIT LOW INPUT
- DTC P0183: FUEL TEMPERATURE SENSOR "A" CIRCUIT HIGH INPUT 3
- DTC P0325: KNOCK SENSOR (KS) CIRCUIT HIGH INPUT - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0327: KNOCK SENSOR (KS) CIRCUIT LOW INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P0328: KNOCK SENSOR (KS) CIRCUIT HIGH INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P0335: CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT MALFUNCTION
- DTC P0336: CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM
- DTC P0340: CAMSHAFT POSITION (CMP) SENSOR CIRCUIT MALFUNCTION
- DTC P0341: CAMSHAFT POSITION (CMP) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM
- DTC P0420: CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD
- DTC P0440: EVAP SYSTEM MALFUNCTION - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0442: EVAP SYSTEM PURGE CONTROL VALVE CIRCUIT MALFUNCTION - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P0443: EVAP SYSTEM PURGE CONTROL VALVE CIRCUIT LOW INPUT - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0444: EVAP SYSTEM PURGE CONTROL VALVE CIRCUIT LOW INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P0445: EVAP SYSTEM PURGE CONTROL VALVE CIRCUIT HIGH INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P0446: EVAP SYSTEM VENT CONTROL CIRCUIT LOW INPUT - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT 1
- DTC P0447: EVAP SYSTEM VENT CONTROL CIRCUIT LOW INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P0448: EVAP SYSTEM VENT CONTROL CIRCUIT HIGH INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P0451: EVAP SYSTEM PRESSURE SENSOR RANGE/PERFORMANCE PROBLEM 2
- DTC P0452: EVAP SYSTEM PRESSURE SENSOR LOW INPUT - LEGACY & OUTBACK 2.5L 1
- DTC P0453: EVAP SYSTEM PRESSURE SENSOR HIGH INPUT - FORESTER, IMPREZA & OUTBACK SPORT
- DTC P0453: EVAP SYSTEM PRESSURE SENSOR HIGH INPUT - LEGACY & OUTBACK 2.5L
- DTC P0456: EVAP SYSTEM MALFUNCTION - LEGACY & OUTBACK 2.5L A/T
- DTC P0461: FUEL LEVEL SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM
- DTC P0462: FUEL LEVEL SENSOR CIRCUIT LOW INPUT 4
- DTC P0464: FUEL LEVEL SENSOR INTERMITTENT INPUT - LEGACY & OUTBACK 2.5L A/T 2
- DTC P0483: COOLING FAN FUNCTION PROBLEM 1
- DTC P0505: IDLE CONTROL SYSTEM LOW INPUT - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0506: IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P0506: IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0507: IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED
- DTC P0512: STARTER SWITCH CIRCUIT HIGH INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P0601: INTERNAL CONTROL MODULE MEMORY CHECK SUM ERROR - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P0604: INTERNAL CONTROL MODULE MEMORY CHECK SUM ERROR - LEGACY & OUTBACK 2.5L A/T
- DTC P0703: BRAKE SWITCH INPUT MALFUNCTION (A/T)
- DTC P0731, DTC P0732, DTC P0733 & DTC P0734
- DTC P0741: TORQUE CONVERTER CLUTCH SYSTEM MALFUNCTION (A/T)
- DTC P1100: STARTER SWITCH CIRCUIT LOW INPUT - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT 2
- DTC P1101: NEUTRAL POSITION SWITCH CIRCUIT LOW INPUT (M/T) - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1103: ENGINE TORQUE CONTROL SIGNAL NO. 1 CIRCUIT MALFUNCTION (A/T) - FORESTER, IMPREZA & OUTBACK SPORT 1
- DTC P1106: ENGINE TORQUE CONTROL SIGNAL NO. 2 CIRCUIT MALFUNCTION (A/T) - FORESTER, IMPREZA & OUTBACK SPORT
- DTC P1110: ATMOSPHERIC PRESSURE SENSOR CIRCUIT LOW INPUT - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P1110: ATMOSPHERIC PRESSURE SENSOR CIRCUIT LOW INPUT - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1111: ATMOSPHERIC PRESSURE SENSOR CIRCUIT HIGH INPUT- FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P1111: ATMOSPHERIC PRESSURE SENSOR CIRCUIT HIGH INPUT - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1112: ATMOSPHERIC PRESSURE SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P1112: ATMOSPHERIC PRESSURE SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1115: ENGINE TORQUE CONTROL CUT SIGNAL CIRCUIT HIGH INPUT - FORESTER, IMPREZA & OUTBACK SPORT
- DTC P1116: ENGINE TORQUE CONTROL CUT SIGNAL CIRCUIT LOW INPUT - FORESTER, IMPREZA & OUTBACK SPORT
- DTC P1120: STARTER SWITCH CIRCUIT HIGH INPUT - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1121: NEUTRAL POSITION SWITCH CIRCUIT LOW INPUT (A/T) - FORESTER, IMPREZA & OUTBACK SPORT 1
- DTC P1121: NEUTRAL POSITION SWITCH CIRCUIT HIGH INPUT (M/T) - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1130: FRONT HO2S CIRCUIT MALFUNCTION (OPEN CIRCUIT) - FORESTER & IMPREZA 2.5L
- DTC P1130: FRONT HO2S CIRCUIT MALFUNCTION (OPEN CIRCUIT) - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT 1
- DTC P1131: FRONT HO2S CIRCUIT MALFUNCTION (SHORT CIRCUIT) - FORESTER & IMPREZA 2.5L
- DTC P1131: FRONT HO2S CIRCUIT MALFUNCTION (SHORT CIRCUIT) - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT 2
- DTC P1133: FRONT HO2S HEATER CIRCUIT HIGH INPUT - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1134: FRONT HO2S MICRO-COMPUTER PROBLEM - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1137: FRONT HO2S CIRCUIT RANGE/PERFORMANCE PROBLEM - LEGACY & OUTBACK 2.5L A/T
- DTC P1139: FRONT HO2S NO. 1 HEATER CIRCUIT RANGE/PERFORMANCE PROBLEM - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1142: THROTTLE POSITION (TP) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (LOW INPUT) - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P1142: THROTTLE POSITION (TP) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (LOW INPUT) - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1146: PRESSURE SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) - LEGACY & OUTBACK 2.5L A/T
- DTC P1151: REAR HO2S HEATER CIRCUIT HIGH INPUT - FORESTER & IMPREZA 2.5L
- DTC P1151: REAR HO2S HEATER CIRCUIT HIGH INPUT - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1207: AIR ASSIST INJECTOR SOLENOID VALVE CIRCUIT LOW INPUT - FORESTER & IMPREZA 2.5L
- DTC P1208: AIR ASSIST INJECTOR SOLENOID VALVE CIRCUIT HIGH INPUT - FORESTER & IMPREZA 2.5L
- DTC P1325: KNOCK SENSOR (KS) CIRCUIT LOW INPUT - FORESTER & IMPREZA 2.5L
- DTC P1400: FUEL TANK PRESSURE CONTROL SOLENOID VALVE CIRCUIT LOW INPUT
- DTC P1420: FUEL TANK PRESSURE CONTROL SOLENOID VALVE CIRCUIT HIGH INPUT
- DTC P1422: EVAP SYSTEM PURGE CONTROL SOLENOID VALVE CIRCUIT HIGH INPUT - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1423: EVAP SYSTEM VENT CONTROL HIGH INPUT - FORESTER, IMPREZA, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1442: FUEL LEVEL SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM 2 - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T 2
- DTC P1445: AIR ASSIST INJECTOR SOLENOID VALVE MALFUNCTION - FORESTER & IMPREZA 2.5L
- DTC P1480: COOLING FAN RELAY NO. 1 CIRCUIT HIGH INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P1490: THERMOSTAT MALFUNCTION - FORESTER & IMPREZA 2.5L
- DTC P1505: IDLE CONTROL SYSTEM CIRCUIT HIGH INPUT - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1507: IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE) - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P1507: IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE) - IMPREZA 2.2L, LEGACY & OUTBACK 2.5L M/T & OUTBACK SPORT
- DTC P1510, P1512, P1514 & P1516: IDLE AIR CONTROL (IAC) SOLENOID VALVE SIGNAL NO. 1-4 CIRCUITS LOW INPUT - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P1511, P1513, P1515 & P1517: IDLE AIR CONTROL (IAC) SOLENOID VALVE SIGNAL NO. 1-4 CIRCUITS HIGH INPUT - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P1518: STARTER SWITCH CIRCUIT LOW INPUT - LEGACY & OUTBACK 2.5L A/T 1
- DTC P1540: VEHICLE SPEED SENSOR (VSS) MALFUNCTION 2 - FORESTER, IMPREZA 2.5L & LEGACY & OUTBACK 2.5L A/T
- DTC P1560: BACK-UP VOLTAGE CIRCUIT MALFUNCTION
- DTC P1590: NEUTRAL POSITION SWITCH CIRCUIT HIGH INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P1591: NEUTRAL POSITION SWITCH CIRCUIT LOW INPUT - LEGACY & OUTBACK 2.5L A/T
- DTC P1701: CRUISE CONTROL SET SIGNAL CIRCUIT MALFUNCTION (A/T) 1