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Subaru Factory DTC Code Definitions
EVAP valve/ fuel tank/ hose/pipe blockage| P1086 | Intake manifold air control actuator position sensor/ LH | voltage low | |
| P1087 | Intake manifold air control actuator position sensor/ LH | voltage high | |
| P1088 | Intake manifold air control actuator position sensor/ RH | voltage low | |
| P1089 | Intake manifold air control actuator position sensor/ RH | voltage high | |
| P1090 | Intake manifold air control actuator/ RH | stuck open | |
| P1091 | Intake manifold air control actuator/ RH | stuck closed | |
| P1092 | Intake manifold air control actuator/ LH | stuck open | |
| P1093 | Intake manifold air control actuator/ LH | stuck closed | |
| P1094 | Intake manifold air control actuator/ RH | open circuit | |
| P1095 | Intake manifold air control actuator/ RH | over current/short circuit | |
| P1096 | Intake manifold air control actuator/ LH | open circuit | |
| P1097 | Intake manifold air control actuator/ LH | over current/short circuit | |
| P1100 | Starter signal | circuit malfunction | |
| P1101 | Neutral position (NP) switch | MT | circuit malfunction |
| P1102 | MAP/BARO sensor | switching valve | circuit malfunction |
| P1103 | Engine torque control signal 1 | circuit malfunction | |
| P1104 | Traction control signal | circuit malfunction | |
| P1106 | Engine torque control signal 2 | circuit malfunction | |
| P1110 | Barometric pressure (BARO) sensor | voltage low | |
| P1111 | Barometric pressure (BARO) sensor | voltage high | |
| P1112 | Barometric pressure (BARO) sensor | range/performance problem | |
| P1115 | Engine torque control cut signal | voltage high | |
| P1116 | Engine torque control cut signal | voltage low | |
| P1120 | Starter signal | voltage high | |
| P1121 | Park/neutral position (PNP) switch neutral position (NP) switch | voltage low | |
| P1122 | MAP/BARO sensor switching valve | voltage high | |
| P1124 | Traction control signal | voltage high | |
| P1130 | Heated oxygen sensor (H025) 1 | open circuit | |
| P1131 | Heated oxygen sensor (HO2S) I | short circuit | |
| P1132 | Heated oxygen sensor (HO2S) 1 | voltage low | |
| P1133 | Heated oxygen sensor (H025) 1 | voltage high | |
| P1134 | Engine control module (ECM) | ||
| P1137 | Heated oxygen sensor (HO2S) 1 | range/performance problem | |
| P1139 | Heated oxygen sensor (HO2S) 1/ heater control | range/performance problem | |
| P1140 | Heated oxygen sensor (H025) I/ bank 2/heater | range/performance problem | |
| P1141 | Mass air flow (MAF) sensor | range/performance problem voltage high | |
| P1142 | Throttle position (TP) sensor | range/performance problem voltage low | |
| P1143 | MAP/BARO sensor | range/performance problem voltage low | |
| P1144 | Manifold absolute pressure (MAP) sensor/barometric pressure (BARO) sensor | range/performance problem Voltage high | |
| P1146 | Manifold absolute pressure (MAP) sensor | range/performance problem voltage high | |
| P1150 | Heated oxygen sensor (HO2S) 1/heater | voltage high | |
| P1151 | Heated oxygen sensor (H025)2 | voltage high | |
| P1152 | Heated oxygen sensor (HO2S) 1/ bank 1 | range/performance problem voltage low | |
| P1153 | Heated oxygen sensor (HO2S) I/ bank 1 | range/performance problem voltage high | |
| P1154 | Heated oxygen sensor (HO2S) 1/ bank 2 | range/performance problem voltage low | |
| P1155 | Heated oxygen sensor (HO2S) 1/ bank 2 | range/performance problem voltage high | |
| P1160 | Throttle actuator control (TAC) | return spring failure | |
| P1207 | Injector air control solenoid | voltage low | |
| P1208 | Injector air control solenoid | voltage high | |
| P1230 | Fuel pump (FP) control module | circuit malfunction | |
| P1244 | Turbocharger (TC) waste gate regulating valve | voltage low | |
| P1245 | Turbocharger (TC) waste gate regulating valve | failsafe | |
| P1301 | Exhaust gas temperature sensor | misfire/fire due to increased temperature | |
| P1312 | Exhaust gas temperature sensor | ||
| P1325 | Knock sensor (KS) | voltage low | |
| P1400 | Fuel tank pressure control solenoid | circuit malfunction voltage low | |
| P1401 | Fuel tank pressure control system | malfunction | |
| P1402 | Fuel level sensor | circuit malfunction | |
| P1420 | Fuel tank pressure control solenoid | circuit malfunction voltage high | |
| P1421 | Exhaust gas Recirculation (EGR) system | voltage high | |
| P1422 | Evaporative emission (EVAP) canister purge valve | voltage high | |
| P1423 | Evaporative emission (EVAP) canister purge system | vent control voltage high | |
| P1440 | Fuel tank pressure control system | voltage low | |
| P1441 | Fuel tank pressure control system | Fuel tank pressure control solenoid/ fuel voltage high filler cap/ EVAP drain/vent valve/ | |
| P1442 | Fuel level sensor | range/performance problem Fuel level sensor | |
| P1443 | Evaporative emission (EVAP) canister purge Hose blockage/ EVAP drain valve system | vent control malfunction | |
| P1445 | Injector air control solenoid | circuit malfunction Wiring/ Injector air control solenoid/ ECM | |
| P1446 | Evaporative emission (EVAP) atmospheric Wiring/ atmospheric pressure solenoid/ ECM pressure solenoid | voltage low | |
| P1447 | Evaporative emission (EVAP) atmospheric pressure solenoid | voltage high | |
| P1448 | Evaporative emission (EVAP) atmospheric pressure solenoid | range/performance problem | |
| P1480 | Engine coolant blower motor relay I | voltage high | |
| P1490 | Thermostat | malfunction | |
| P1491 | Positive crankcase ventilation | malfunction | |
| P1492 | Exhaust gas Recirculation (EGR) solenoid valve | signal 1 | voltage low |
| P1493 | Exhaust gas Recirculation (EGR) solenoid valve | signal 1 | voltage high |
| P1494 | Exhaust gas Recirculation (EGR) solenoid valve | signal 2 | voltage low |
| P1495 | Exhaust gas Recirculation (EGR) solenoid valve | signal 2 | voltage high |
| P1496 | Exhaust gas Recirculation (EGR) solenoid valve | signal 3 | voltage low |
| P1497 | Exhaust gas Recirculation (EGR) solenoid valve | signal 3 | voltage high |
| P1498 | Exhaust gas Recirculation (EGR) solenoid valve | signal 4 | voltage low |
| P1499 | Exhaust gas Recirculation (EGR) solenoid valve | signal 4 | voltage high |
| P1500 | Engine coolant blower motor relay 1 | circuit malfunction | |
| P1502 | Engine coolant blower motor | malfunction | |
| P1505 | Idle air (IAC) control valve | voltage high | |
| P1507 | Idle air (IAC) control system | malfunction | |
| P1510 | Idle air (IAC) control valve circuit 1 | voltage low | |
| P1511 | Idle air (IAC) control valve circuit I | voltage high | |
| P1512 | Idle air (IAC) control valve circuit 2 | voltage low | |
| P1513 | Idle air (IAC) control valve circuit 2 | voltage high | |
| P1514 | Idle air (IAC) control valve circuit 3 | voltage low | |
| P1515 | Idle air (IAC) control valve circuit 3 | voltage high | |
| P1516 | Idle air (IAC) control valve circuit 4 | voltage low | |
| P1517 | Idle air (IAC) control valve circuit 4 | voltage high | |
| P1518 | Starter motor switch | circuit malfunction | |
| P1520 | Engine coolant blower motor relay 1 | voltage high | |
| P1540 | Vehicle speed sensor (VS$) | malfunction 2 | |
| P1544 | Exhaust gas temperature sensor | increased temperature detected | |
| P1560 | Engine control module (ECM) | battery voltage supply | |
| P1590 | Park neutral position (PNP) switch | voltage high | |
| P1591 | Park neutral position (PNP) switch | voltage low | |
| P1592 | Park neutral position (PNP) switch | circuit malfunction | |
| P1594 | Transmission control module (TCM) | communication circuit malfunction | |
| P1595 | Transmission control module (TCM) | communication circuit voltage low | |
| P1596 | Transmission control module (TCM) | communication circuit voltage high | |
| P1698 | Engine torque control cut signal | voltage low | |
| P1699 | Engine torque control cut signal | voltage high | |
| P1700 | AT | throttle position (TP) sensor | circuit malfunction |
| P1701 | control set signal | AT | circuit malfunction |
| P1702 | AT diagnosis signal | voltage low | |
| P1703 | Shift solenoid (SS) low clutch timing | circuit malfunction | |
| P1705 | Shift solenoid (SS) 2-4 brake pressure control | circuit malfunction | |
| P1711 | Engine torque control signal 1 | circuit malfunction | |
| P1712 | Engine torque control signal 2 | circuit malfunction | |
| P1722 | AT diagnosis signal | voltage high | |
| P1742 | Automatic transmission diagnosis signal | circuit malfunction |