Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU2005OUTBACK I, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMDIAGNOSTIC TROUBLE CODE (DTC) DETECTING CRITERIA (H4SO)
2005 Subaru Outback i, Standard
Diagnostic Trouble Code (DTC) Detecting Criteria (H4SO)
2005 Subaru Outback i, StandardSECTION Diagnostic Trouble Code (DTC) Detecting Criteria (H4SO)
- List of Diagnostic Trouble Code (DTC)
- Diagnostic Trouble Code (DTC) Detecting Criteria
- DTC P0030 HO2S HEATER CONTROL CIRCUIT Bank 1 Sensor 1
- DTC P0031 H02S HEATER CONTROL CIRCUIT LOW Bank 1 Sensor 1
- DTC P0032 H02S HEATER CONTROL CIRCUIT HIGH Bank 1 Sensor 1
- DTC P0037 H02S Heater Control Circuit Low (Bank 1 Sensor 2)
- DTC P0038 H02S Heater Control Circuit High (Bank 1 Sensor 2)
- DTC P0068 Map/MAF - Throttle Position Correlation
- DTC P0101 Mass Or Volume Air Flow Circuit Range/Performance
- DTC P0102 Mass Or Volume Air Flow Circuit Low Input
- DTC P0103 Mass Or Volume Air Flow Circuit High Input
- DTC P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
- DTC P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- DTC P0111 Intake Air Temperature Circuit Range/Performance
- DTC P0112 Intake Air Temperature Circuit Low Input
- DTC P0113 Intake Air Temperature Circuit High Input
- DTC P0117 Engine Coolant Temperature Circuit Low Input
- DTC P0118 Engine Coolant Temperature Circuit High Input
- DTC P0122 Throttle/Pedal Position Sensor/Switch "A" Circuit Low Input
- DTC P0123 Throttle/Pedal Position Sensor/Switch "A" Circuit High Input
- DTC P0125 Insufficient Engine Coolant Temperature For Closed Loop Fuel Control
- DTC P0126 Insufficient Engine Coolant Temperature For Stable Operation
- DTC P0128 Coolant Thermostat (Engine Coolant Temperature Below Thermostat Regulating Temperature)
- DTC P0131 02 SENSOR CIRCUIT LOW VOLTAGE Bank 1 Sensor 1
- DTC P0132 02 SENSOR CIRCUIT HIGH VOLTAGE Bank 1 Sensor 1
- DTC P0133 02 SENSOR CIRCUIT SLOW RESPONSE Bank 1 Sensor 1
- DTC P0134 02 SENSOR CIRCUIT NO ACTIVITY DETECTED Bank 1 Sensor 1
- DTC P0137 02 Sensor Circuit Low Voltage (Bank 1 Sensor 2)
- DTC P0138 02 Sensor Circuit High Voltage (Bank 1 Sensor 2)
- DTC P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)
- DTC P0171 System Too Lean (Bank 1)
- DTC P0172 System Too Rich (Bank 1)
- DTC P0181 Fuel Temperature Sensor "A" Circuit Range/Performance
- DTC P0182 Fuel Temperature Sensor "A" Circuit Low Input
- DTC P0183 Fuel Temperature Sensor "A" Circuit High Input
- DTC P0222 Throttle/Pedal Position Sensor/Switch "B" Circuit Low Input
- DTC P0223 Throttle/Pedal Position Sensor/Switch "B" Circuit High Input
- DTC P0301 Cylinder 1 Misfire Detected
- DTC P0302 Cylinder 2 Misfire Detected 1. Outline Of Diagnosis
- DTC P0303 Cylinder 3 Misfire Detected
- DTC P0304 Cylinder 4 Misfire Detected
- DTC P0327 Knock Sensor 1 Circuit Low Input (Bank 1 Or Single Sensor)
- DTC P0328 Knock Sensor 1 Circuit High Input (Bank 1 Or Single Sensor)
- DTC P0335 Crankshaft Position Sensor "A" Circuit
- DTC P0336 Crankshaft Position Sensor "A" Circuit Range/Performance
- DTC P0340 Camshaft Position Sensor "A" Circuit (Bank 1 Or Single Sensor)
- DTC P0341 Camshaft Position Sensor "A" Circuit Range/Performance (Bank 1 Or Single Sensor)
- DTC P0400 Exhaust Gas RECIRCULATION Flow
- DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1)
- DTC P0442 Evaporative Emission Control System Leak Detected (Small Leak)
- Outline Of Diagnosis
- Component Description
- Enable Condition
- General Driving Cycle
- Diagnostic Method
- DTC Clear Condition
- Malfunction Indicator Light Clear Condition
- Fail Safe
- ECM Operation At DTC Setting
- DTC P0447 Evaporative Emission Control System Vent Control Circuit Open
- DTC P0448 Evaporative Emission Control System Vent Control Circuit Shorted
- DTC P0451 Evaporative Emission Control System Pressure Sensor
- DTC P0452 Evaporative Emission Control System Pressure Sensor Low Input
- DTC P0453 Evaporative Emission Control System Pressure Sensor High Input
- DTC P0456 Evaporative Emission Control System Leak Detected (Very Small Leak)
- DTC P0457 Evaporative Emission Control System Leak Detected (Fuel Cap Loose/Off)
- DTC P0458 Evaporative Emission Control System Purge Control Valve Circuit Low
- DTC P0459 Evaporative Emission Control System Purge Control Valve Circuit High
- DTC P0461 Fuel Level Sensor Circuit Range/Performance
- DTC P0462 Fuel Level Sensor Circuit Low Input
- DTC P0463 Fuel Level Sensor Circuit High Input
- DTC P0464 Fuel Level Sensor Circuit Intermittent
- DTC P0483 Cooling Fan Rationality Check
- DTC P0500 Vehicle Speed Sensor
- DTC P0506 Idle Control System Rpm Lower Than Expected
- DTC P0507 Idle Control System Rpm Higher Than Expected
- DTC P0512 Starter Request Circuit
- DTC P0519 Idle Control System Malfunction (Fail-Safe)
- DTC P0600 Serial Communication Link
- DTC P0604 Internal Control Module Random Access Memory (Ram) Error
- DTC P0605 Internal Control Module Read Only Memory (ROM) Error
- DTC P0607 Control Module Performance
- DTC P0638 Throttle Actuator Control Range/Performance (Bank1)
- DTC P0691 Cooling Fan 1 Control Circuit Low
- DTC P0692 Cooling Fan 1 Control Circuit High
- DTC P0700 Transmission Control System (Mil Request)
- DTC P0851 Neutral Switch Input Circuit Low (At Model)
- DTC P0851 Neutral Switch Input Circuit Low (Mt Model)
- DTC P0852 Neutral Switch Input Circuit High (At Model)
- DTC P0852 Neutral Switch Input Circuit High (Mt Model)
- DTC P1152 O2 Sensor Circuit Range/Performance (Low) (Bank1 Sens0R1)
- DTC P1153 O2 Sensor Circuit Range/Performance (High) (Bank1 Sensor1)
- DTC P1160 Return Spring Failure
- DTC P1400 Fuel Tank Pressure Control Solenoid Valve Circuit Low
- DTC P1420 Fuel Tank Pressure Control Sol. Valve Circuit High
- DTC P1443 Vent Control Solenoid Valve Function Problem
- DTC P1446 Fuel Tank Sensor Control Valve Circuit Low
- DTC P1447 Fuel Tank Sensor Control Valve Circuit High
- DTC P1492 EGR Solenoid Valve Signal #1 Circuit Malfunction (Low Input)
- DTC P1493 EGR Solenoid Valve Signal #1 Circuit Malfunction (High Input)
- DTC P1494 EGR Solenoid Valve Signal #2 Circuit Malfunction (Low Input)
- DTC P1495 EGR Solenoid Valve Signal #2 Circuit Malfunction (High Input)
- DTC P1496 EGR Solenoid Valve Signal #3 Circuit Malfunction (Low Input)
- DTC P1497 EGR Solenoid Valve Signal #3 Circuit Malfunction (High Input)
- DTC P1498 EGR Solenoid Valve Signal #4 Circuit Malfunction (Low Input)
- DTC P1499 EGR Solenoid Valve Signal #4 Circuit Malfunction (High Input)
- DTC P1518 Starter Switch Circuit Low Input
- DTC P1560 Back-Up Voltage Circuit Malfunction
- DTC P2096 Post Catalyst Fuel Trim System Too Lean Bank 1
- DTC P2097 Post Catalyst Fuel Trim System Too Rich Bank 1
- DTC P2101 Throttle Actuator Control Motor Circuit Range/Performance
- DTC P2102 Throttle Actuator Control Motor Circuit Low
- DTC P2103 Throttle Actuator Control Motor Circuit High
- DTC P2109 Throttle/Pedal Position Sensor A Minimum Stop Performance
- DTC P2122 Throttle/Pedal Position Sensor/Switch "D" Circuit Low Input
- DTC P2123 Throttle/Pedal Position Sensor/Switch "D" Circuit High Input
- DTC P2127 Throttle/Pedal Position Sensor/Switch "E" Circuit Low Input
- DTC P2128 Throttle/Pedal Position Sensor/Switch "E" Circuit High Input
- DTC P2135 Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Rationality
- DTC P2138 Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Rationality
- DTC P2227 Barometric Pressure Circuit Range/Performance
- DTC P2228 Barometric Pressure Circuit Low Input
- DTC P2229 Barometric Pressure Circuit High Input
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.