Subaru Fault Codes

Subaru Fault (Trouble) Codes

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These fault code lists contain the code and fault description for Subaru! Models include. Justy, Vivio, 1600, 1800, L1800, Trezia, Impreza, WRX, XV, Legacy, Forester, B9 Tribeca, Tribeca, Legacy Outback, Sumo, Libero, Outback, SVX and MV. 

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Fault Code	Fault Description
11111	No fault found
11	Crankshaft position (CKP) sensor
21	Engine coolant temperature (ECT) sensor
22	Knock sensor (KS)
23	Manifold absolute pressure (MAP) sensor
24	Idle air control (IAC) valve
26	Intake air temperature (IAT) sensor
31	Throttle position (TP) sensor
32	Heated oxygen sensor (HO2S)
33	Vehicle speed sensor (VSS)
35	Evaporative emission (EVAP) canister purge valve
38	Torque control signal (AT)
45	Manifold absolute pressure (MAP) sensor - circuit malfunction
46	CO adjustment resistor - without cat
49	CO adjustment resistor - without cat
51	Neutral position (NP) switch (MT)
53	Immobilizer
54	Manifold absolute pressure (MAP) sensor - incorrect signal
85	Engine control module (ECM) - supply voltage high/low
P1026	Variable valve lift oil control valve, RH bank - performance problem
P1028	Variable valve lift oil control valve, LH bank - performance problem
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 - actuator stuck open
P1091	Intake manifold air control actuator, RH - actuator stuck closed
P1092	Intake manifold air control actuator, LH - actuator stuck open
P1093	Intake manifold air control actuator, LH - actuator stuck closed
P1094	Intake manifold air control actuator, RH - open circuit
P1095	Intake manifold air control actuator, RH - circuit over current/short circuit
P1096	Intake manifold air control actuator, LH - open circuit
P1097	Intake manifold air control actuator, LH - circuit over current/short circuit
P1100	Starter signal - circuit malfunction
P1101	Neutral position (NP) switch - MT - circuit malfunction
P1101	Park/neutral position (PNP) switch - circuit malfunction
P1102	MAP/BARO 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
P1107	Secondary air injection (AIR) solenoid - 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 signal - voltage high
P1116	Engine torque control signal - voltage low
P1120	Starter signal - voltage high
P1121	Park/neutral position (PNP) switch/neutral position (NP) switch - voltage low
P1122	MAP/BARO switching valve - voltage high
P1124	Traction control signal - voltage high
P1130	Heated oxygen sensor (HO2S) 1 - open circuit
P1131	Heated oxygen sensor (HO2S) 1 - short circuit
P1132	Heated oxygen sensor (HO2S) 1 - voltage low
P1133	Heated oxygen sensor (HO2S) 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 (HO2S) 1, bank 2, heater - range/performance problem
P1141	Mass air flow (MAF) sensor - range/performance problem
P1142	Throttle position (TP) sensor - range/performance problem, voltage low
P1143	MAP sensor/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 (HO2S) 2 - voltage high
P1152	Heated oxygen sensor (HO2S) 1, bank 1 - range/performance problem, voltage low
P1153	Heated oxygen sensor (HO2S) 1, 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), throttle return spring - malfunction
P1207	Air assisted injector solenoid - voltage low
P1208	Air assisted injector solenoid - voltage high
P1208	Knock sensor (KS) - voltage low
P1230	Fuel pump (FP) control module - circuit malfunction
P1244	Turbocharger (TC) wastegate regulating valve - voltage low
P1245	Turbocharger (TC) wastegate regulating valve - fail safe mode
P1301	Exhaust gas temperature sensor - misfire detected, fire detected
P1306	Camshaft position (CMP) actuator, RH - open circuit
P1307	Camshaft position (CMP) actuator, RH - short circuit
P1308	Camshaft position (CMP) actuator, LH - open circuit
P1309	Camshaft position (CMP) actuator, LH - short circuit
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) system - vent control, voltage high
P1440	Fuel tank pressure control system - voltage low
P1441	Fuel tank pressure control system - voltage high
P1442	Fuel level sensor - range/performance problem
P1443	Evaporative emission (EVAP) system - vent control malfunction
P1445	Air assisted injector solenoid - circuit malfunction
P1446	Evaporative emission (EVAP) solenoid, atmospheric pressure - voltage low
P1447	Evaporative emission (EVAP) solenoid, atmospheric pressure - voltage high
P1448	Evaporative emission (EVAP) solenoid, atmospheric pressure - range/performance problem
P1480	Engine coolant blower motor relay 1 - voltage high
P1490	Coolant thermostat - malfunction
P1491	Positive crankcase ventilation (PCV) - malfunction
P1492	Exhaust gas recirculation (EGR) valve/solenoid - signal 1 - voltage low
P1493	Exhaust gas recirculation (EGR) valve/solenoid - signal 1 - voltage high
P1494	Exhaust gas recirculation (EGR) valve/solenoid - signal 2 - voltage low
P1495	Exhaust gas recirculation (EGR) valve/solenoid - signal 2 - voltage high
P1496	Exhaust gas recirculation (EGR) valve/solenoid - signal 3 - voltage low
P1497	Exhaust gas recirculation (EGR) valve/solenoid - signal 3 - voltage high
P1498	Exhaust gas recirculation (EGR) valve/solenoid - signal 4 - voltage low
P1499	Exhaust gas recirculation (EGR) valve/solenoid - signal 4 - voltage high
P1500	Engine coolant blower motor relay 1 - circuit malfunction
P1502	Engine coolant blower motor - malfunction
P1505	Idle air control (IAC) valve - voltage high
P1507	Idle air control (IAC) system - malfunction
P1510	Idle air control (IAC) valve circuit 1 malfunction - voltage low
P1511	Idle air control (IAC) valve circuit 1 malfunction - voltage high
P1512	Idle air control (IAC) valve circuit 2 malfunction - voltage low
P1513	Idle air control (IAC) valve circuit 2 malfunction - voltage high
P1514	Idle air control (IAC) valve circuit 3 malfunction - voltage low
P1515	Idle air control (IAC) valve circuit 3 malfunction - voltage high
P1516	Idle air control (IAC) valve circuit 4 malfunction - voltage low
P1517	Idle air control (IAC) valve circuit 4 malfunction - voltage high
P1518	Starter motor switch - circuit malfunction
P1520	Engine coolant blower motor relay 1 - voltage high
P1521	Stop lamp switch - voltage high
P1540	Vehicle speed sensor (VSS) - malfunction
P1544	Exhaust gas temperature sensor - high temperature detected
P1560	Engine control module (ECM) - battery supply voltage
P1570	Immobilizer read coil
P1571	Engine control module (ECM) - incorrect immobilizer code
P1572	Immobilizer control module/ECM - circuit malfunction
P1574	Immobilizer control module - communication error
P1576	Engine control module (ECM) - EEPROM error
P1577	Immobilizer control module - EEPROM error
P1578	Body control module (BCM) to instrument cluster communication - malfunction
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) - circuit malfunction
P1595	Transmission control module (TCM) - circuit malfunction, voltage low
P1596	Transmission control module (TCM) - circuit malfunction, voltage high
P1698	Engine torque control signal - voltage low
P1699	Engine torque control signal - voltage high
P1700	Automatic transmission - throttle position (TP) sensor - circuit malfunction
P1701	Cruise control, SET signal - AT - circuit malfunction
P1702	Automatic transmission diagnosis signal - voltage low
P1703	Transmission low clutch timing solenoid - circuit malfunction
P1704	2nd/4th shift timing solenoid - circuit malfunction
P1705	2nd/4th pressure control solenoid - circuit malfunction
P1711	Engine torque control signal 1 - circuit malfunction
P1712	Engine torque control signal 2 - circuit malfunction
P1722	Automatic transmission diagnosis signal - voltage high
P1742	Automatic transmission diagnosis signal - circuit malfunction