Diagnostic Trouble Code Definitions
WARNING: This page is about a different car, the 2002 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
SUBARU DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION CHART
| Code No. | Circuit Affected | ||
|---|---|---|---|
| P0031 | Front Heated Oxygen Sensor (HO2S) Heater Circuit, Low Input | ||
| P0032 | Front HO2S Heater Circuit, High Input | ||
| P0037 | Rear HO2S Heater Circuit Malfunction | ||
| P0038 | Rear HO2S Heater Circuit, High Input | ||
| P0101 | Mass Air Flow Circuit Range/Performance Problem, High Input | ||
| P0102 | Mass Air Flow Circuit, Low Input | ||
| P0103 | Mass Air Flow Circuit, High Input | ||
| P0106 | Pressure Sensor Circuit Range/Performance Problem, Low Input | ||
| P0107 | Pressure Sensor Circuit, Low Input | ||
| P0108 | Pressure Sensor Circuit, High Input | ||
| P0111 | Intake Air Temperature (IAT) Sensor Circuit Range/Performance Problem | ||
| P0112 | Intake Air Temperature (IAT) Sensor Circuit, Low Input | ||
| P0113 | Intake Air Temperature (IAT) Sensor Circuit, High Input | ||
| P0117 | Engine Coolant Temperature (ECT) Sensor Circuit, Low Input | ||
| P0118 | Engine Coolant Temperature (ECT) Sensor Circuit, High Input | ||
| P0121 | Throttle Position (TP) Sensor Circuit Range/Performance Problem, High Input | ||
| P0122 | Throttle Position (TP) Sensor Circuit, Low Input | ||
| P0123 | Throttle Position (TP) Sensor Circuit, High Input | ||
| P0125 | Insufficient Coolant Temperature For Closed Loop Fuel Control | ||
| P0128 | Thermostat Malfunction | ||
| P0132 | Front HO2S Circuit Range/Performance Problem, High Input | ||
| P0133 | Front HO2S Circuit, Slow Response | ||
| P0136 | Rear HO2S Circuit Malfunction | ||
| P0139 | Rear HO2S Circuit, Slow Response | ||
| P0171 | Fuel Trim Malfunction, Too Lean | ||
| P0172 | Fuel Trim Malfunction, Too Rich | ||
| P0181 | Fuel Temperature Sensor "A" Circuit Range/Performance Problem | ||
| P0182 | Fuel Temperature Sensor "A" Circuit, Low Input | ||
| P0183 | Fuel Temperature Sensor "A" Circuit, High Input | ||
| P0244 | Wastegate Control Solenoid Valve Malfunction, High Input | ||
| P0245 | Wastegate Control Solenoid Valve Circuit, Low Input | ||
| P0246 | Wastegate Control Solenoid Valve Circuit, High Input | ||
| P0301 | Cylinder No. 1 Misfire Detected | ||
| P0302 | Cylinder No. 2 Misfire Detected | ||
| P0303 | Cylinder No. 3 Misfire Detected | ||
| P0304 | Cylinder No. 4 Misfire Detected | ||
| P0327 | Knock Sensor (KS) Circuit, Low Input | ||
| P0328 | Knock Sensor (KS) Circuit, High Input | ||
| P0335 | Crankshaft Position Sensor Circuit Malfunction | ||
| P0336 | Crankshaft Position (CKP) Sensor Circuit Range/Performance Problem | ||
| P0340 | Camshaft Position (CMP) Sensor Circuit Malfunction | ||
| P0341 | Camshaft Position (CMP) Sensor Circuit Range/Performance Problem | ||
| P0420 | Catalyst System Efficiency Below Threshold | ||
| P0442 | EVAP Control System Malfunction | ||
| P0444 | EVAP Control System Purge Control Valve Circuit, Low Input | ||
| P0445 | EVAP Control System Purge Control Valve Circuit, High Input | ||
| P0447 | EVAP Control System Vent Control Circuit, Low Input | ||
| P0448 | EVAP Control System Vent Control Circuit, High Input | ||
| P0451 | EVAP Control System Pressure Sensor Range/Performance Problem | ||
| P0452 | EVAP Control System Pressure Sensor Circuit, Low Input | ||
| P0453 | EVAP Control System Pressure Sensor Circuit, High Input | ||
| P0461 | Fuel Level Sensor Circuit Range/Performance Problem | ||
| P0462 | Fuel Level Sensor Circuit, Low Input | ||
| P0463 | Fuel Level Sensor Circuit, High Input | ||
| P0464 | Fuel Level Sensor Circuit Intermittent Input | ||
| P0480 | Cooling Fan Relay 1 Circuit, Low Input | ||
| P0483 | Cooling Fan Function Problem | ||
| P0500 | Vehicle Speed Sensor Malfunction | ||
| P0506 | Idle Control System RPM Lower Than Expected | ||
| P0507 | Idle Control System RPM Higher Than Expected | ||
| P0508 | Idle Control System Circuit, Low Input | ||
| P0509 | Idle Control System Circuit, High Input | ||
| P0512 | Starter Switch Circuit, High Input | ||
| P0545 | Exhaust Gas Temperature Sensor Circuit, Low Input | ||
| P0546 | Exhaust Gas Temperature Sensor Circuit, High Input | ||
| P0604 | Internal Control Module Memory Check Sum Error | ||
| P0703 (1) | Brake Switch Input Malfunction | ||
| P0731 (1) | Gear 1 Incorrect Ratio (A/T) | ||
| P0732 (1) | Gear 2 Incorrect Ratio (A/T) | ||
| P0733 (1) | Gear 3 Incorrect Ratio (A/T) | ||
| P0734 (1) | Gear 4 Incorrect Ratio (A/T) | ||
| P0741 (1) | Torque Converter Clutch System Malfunction | ||
| P1086 | Tumble Generator Valve No. 2 (LH) Position Sensor Circuit, Low Input | ||
| P1087 | Tumble Generator Valve No. 2 (LH) Position Sensor Circuit, High Input | ||
| P1088 | Tumble Generator Valve No. 1 (RH) Position Sensor Circuit, Low Input | ||
| P1089 | Tumble Generator Valve No. 1 (RH) Position Sensor Circuit, High Input | ||
| P1090 | Tumble Generator Valve System No.1 (RH) Malfunction, Stuck Open | ||
| P1091 | Tumble Generator Valve System No. 1 (RH) Malfunction, Stuck Close | ||
| P1092 | Tumble Generator Valve System No. 2 (LH) Malfunction, Stuck Open | ||
| P1093 | Tumble Generator Valve System No. 2 (LH) Malfunction, Stuck Close | ||
| P1094 | Tumble Generator Valve Circuit No. 1 (RH), Open Circuit | ||
| P1095 | Tumble Generator Valve Circuit No. 1 (RH), Overcurrent | ||
| P1096 | Tumble Generator Valve Circuit No. 2 (LH), Open Circuit | ||
| P1097 | Tumble Generator Valve Circuit No. 2 (LH), Overcurrent | ||
| P1110 | Atmospheric Pressure Sensor Circuit, Low Input | ||
| P1111 | Atmospheric Pressure Sensor Circuit, High Input | ||
| P1112 | Atmospheric Pressure Sensor Circuit Range/Performance Problem | ||
| P1130 | Front HO2S Circuit Malfunction, Open Circuit | ||
| P1131 | Front HO2S Circuit Malfunction, Short Circuit | ||
| P1134 | Front HO2S Micro-Computer Problem | ||
| P1139 | Front HO2S No. 1 Heater Circuit Range/Performance Problem | ||
| P1141 | Mass Air Flow (MAF) Sensor Circuit Range/Performance Problem, Low Input | ||
| P1142 | Throttle Position (TP) Sensor Circuit Range/Performance Problem, Low Input | ||
| P1146 | Pressure Sensor Circuit Range/Performance Problem, High Input | ||
| P1230 | Fuel Pump Controller Malfunction | ||
| P1244 | Wastegate Control Solenoid Valve Range/Performance Problem, Low Input | ||
| P1245 | Wastegate Control Solenoid Valve Malfunction, Fail-Safe | ||
| P1301 | Misfire Due To Increased Exhaust Temperature | ||
| P1312 | Exhaust Gas Temperature Circuit Malfunction | ||
| P1400 | Fuel Tank Pressure Control Solenoid Valve Circuit, Low Input | ||
| P1420 | Fuel Tank Pressure Control Solenoid Valve Circuit, High Input | ||
| P1443 | EVAP Control System Vent Control Function Problem | ||
| P1480 | Cooling Fan Relay 1 Circuit, High Input | ||
| P1507 | Idle Control System Malfunction, Fail-Safe | ||
| P1518 | Starter Switch Circuit, Low Input | ||
| P1544 | High Exhaust Temperature Detected | ||
| P1560 | Back-Up Voltage Circuit Malfunction | ||
| P1590 | Neutral Position Switch Circuit, High Input | ||
| P1591 | Neutral Position Switch Circuit, Low Input | ||
| P1594 (1) | Automatic Transmission Diagnosis Input Signal Circuit Malfunction | ||
| DTC P1595 (1) | Automatic Transmission Diagnosis Input Signal Circuit, Low Input | ||
| P1596 (1) | Automatic Transmission Diagnosis Input Signal Circuit, High Input | ||
| P1698 (1) | Engine Torque Control Cut Signal Circuit, Low Input | ||
| P1699 (1) | Engine Torque Control Cut Signal Circuit, High Input | ||
| P1700 (1) | Throttle Position (TP) Sensor Circuit Malfunction (A/T) | ||
| P1701 (1) | Cruise Control Set Signal Circuit Malfunction (A/T) | ||
| P1711 (1) | Engine Torque Control Signal 1 Circuit Malfunction (A/T) | ||
| P1712 (1) | Engine Torque Control Signal 2 Circuit Malfunction (A/T) | ||
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