Subaru Specific Codes OBD-II OBD2 (1996 & newer)
| Code | Description |
|---|---|
| P1086 | Tumble generator valve #2 (LH) position sensor circuit low input |
| P1087 | Tumble generator valve #2 (LH) position sensor circuit high input |
| P1088 | Tumble generator valve #1 (RH) position sensor circuit low input |
| P1089 | Tumble generator valve #1 (RH) position sensor circuit high input |
| P1090 | Tumble generator valve #1 (RH) malfunction (stuck open) |
| P1091 | Tumble generator valve #1 (RH) malfunction (stuck close) |
| P1092 | Tumble generator valve #2 (LH) malfunction (stuck open) |
| P1093 | Tumble generator valve #2 (LH) malfunction (stuck close) |
| P1094 | Tumble generator valve circuit #1 (open circuit) |
| P1095 | Tumble generator valve circuit #1 (over current) |
| P1096 | Tumble generator valve circuit #2 (open circuit) |
| P1097 | Tumble generator valve circuit #2 (over current) |
| P1100 | Starter Switch Circuit Malfunction |
| P1101 | Neutral Position Switch Circuit High Input (A/T) |
| P1101 | Neutral Position Switch Circuit Malfunction (M/T) |
| P1102 | Pressure Sources Solenoid Valve Circuit Malfunction |
| P1103 | Pressure Sources Switching Solenoid Valve Circuit |
| P1104 | Engine Torque Control Signal Circuit Malfunction |
| P1106 | Engine Torque Control Signal 2 Circuit Malfunction |
| P1110 | Atmospheric pressure sensor low input |
| P1111 | Atmospheric pressure sensor high input |
| P1112 | Atmospheric pressure sensor range/performance problem |
| P1115 | Engine Torque Control Cut Signal Circuit High Input |
| P1116 | Engine Torque Control Cut Signal Circuit Low Input |
| P1120 | Starter Switch High Input |
| P1121 | Neutral Position Switch Circuit High Input [MT Vehicles] |
| P1121 | Neutral Position Switch Circuit Low Input [AT Vehicles] |
| P1122 | Pressure Sources Switching Valve Circuit High Input |
| P1124 | TCS Signal Circuit High Input |
| P1130 | Front oxygen sensor circuit malfunction (open circuit) |
| P1131 | Front oxygen sensor circuit malfunction (short circuit) |
| P1134 | Front oxygen (A/F) sensor microcomputer problem |
| P1137 | Front oxygen (A/F) sensor circuit range/performance problem |
| P1139 | Front oxygen (A/F) sensor #1 heater circuit performance/range problem |
| P1141 | Mass Air Flow Sensor Circuit High Input |
| P1142 | Mass Air Flow Sensor Circuit Low Input |
| P1143 | Pressure Sensor Circuit Low Input |
| P1144 | Pressure Sensor Circuit High Input |
| P1146 | Pressure sensor circuit range/performance problem (high input) |
| P1150 | Front Oxygen Sensor Heater Circuit High Input |
| P1151 | Rear Oxygen Sensor Heater Circuit High Input |
| P1230 | Fuel pump control unit malfunction |
| P1244 | Wastegate control solenoid valve malfunction (low input) |
| P1245 | Wastegate control solenoid valve malfunction (fail-safe) |
| P1301 | Fire due to increased exhaust temperature |
| P1312 | Exhaust temperature sensor malfunction |
| P1325 | Knock Sensor Circuit Low Input |
| P1400 | Fuel Tank Pressure Control Solenoid Low Input |
| P1420 | Fuel Tank Pressure Control Solenoid High Input |
| P1421 | Exhaust Gas Recirculation Circuit High Input |
| P1422 | EVAP Purge Control Valve Circuit High Input |
| P1423 | EVAP Vent Control High Input |
| P1440 | Fuel Tank Pressure Control System Low Input |
| P1441 | Fuel Tank Pressure Control System High Input |
| P1442 | Fuel Level Sensor Circuit Range/Perf |
| P1443 | EVAP Control System Vent Control Function Problem |
| P1480 | Cooling fan relay 1 circuit high input |
| P1500 | Radiator Fan Relay 1 Circuit Malfunction |
| P1501 | Idle Control System Malfunction (Fail Safe) |
| P1502 | Radiator Fan Function Problem |
| P1507 | Idle Control System Malfunction (Fail Safe) |
| P1510 | Idle Air Control Solenoid Signal 1 Circuit Low Input |
| P1511 | Idle Air Control Solenoid Signal 1 Circuit High Input |
| P1512 | Idle Air Control Solenoid Signal 2 Circuit Low Input |
| P1513 | Idle Air Control Solenoid Signal 2 Circuit High Input |
| P1514 | Idle Air Control Solenoid Signal 3 Circuit Low Input |
| P1515 | Idle Air Control Solenoid Signal 3 Circuit High Input |
| P1516 | Idle Air Control Solenoid Signal 4 Circuit Low Input |
| P1517 | Idle Air Control Solenoid Signal 4 Circuit High Input |
| P1518 | Starter switch circuit low input |
| P1520 | Radiator Fan Relay 1 Circuit High Input |
| P1540 | Vehicle Speed Sensor Malfunction 2 |
| 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 |
| P1592 | Neutral position switch circuit (MT model) |
| P1594 | Automatic transmission diagnosis input signal circuit malfunction |
| P1595 | Automatic transmission diagnosis input signal circuit low input |
| P1596 | Automatic transmission diagnosis input signal circuit high input |
| P1698 | Engine torque control cut signal circuit low input |
| P1699 | Engine torque control cut signal circuit high input |
| P1700 | Throttle Position Sensor Circuit Malfunction (A/T) |
| P1701 | Cruise Control Set Signal Circuit Malfunction (A/T) |
| P1702 | Auto Trans Diagnosis Input Signal Circuit |
| P1703 | Low clutch timing control solenoid valve circuit malfunction |
| P1704 | 2-4 Brake Timing Solenoid Valve Circuit Malfunction |
| P1705 | 2-4 Brake Pressure Solenoid Valve (Solenoid D) Circuit |
| P1711 | Engine torque control signal 1 circuit malfunction |
| P1712 | Engine torque control signal 2 circuit malfunction |
| P1722 | Auto Trans Diagnosis Input Signal High Input |
| P1742 | Auto Trans Diagnosis Input Signal Malfunction |
{mospagebreak}
1983 – 1988 Carbureted Subaru Trouble Codes
| Code | Description |
|---|---|
| 11 | Ignition pulse system/crank angle sensor(87 & later) |
| 12 | Ignition pulse system (1983 only)/Starter switch (84 & later) |
| 13 | Crank angle sensor or circuit |
| 14 | Vacuum switches stay on or off (1983 only)/Duty solenoid or circuit(1983 to 1985)/Injectors 1 & 2 (87-up) |
| 15 | Solenoid valve stays on or off (1983 only)/Coasting Fuel Cut (CFC) system (1983 to 1985 ) |
| 16 | Feedback system (1983 to 1985 models) |
| 17 | Fuel pump and automatic choke (1983 to 1985 carbureted) |
| 21 | Ignition pulse system (1983 only)/coolant temperature sensor or circuit (1983 to 1985 carbureted) |
| 22 | Ignition pulse system (1983 only)/Vehicle speed sensor or circuit or VLC solenoid valve or circuit. (1984 to 1988 carbureted) |
| 23 | Oxygen sensor or circuit (1983 to 1988)/pressure sensor or circuit (1983 to 1985) |
| 24 | Vacuum switches stay on or off (1983 only)/coolant temperature sensor or circuit, or Idle-up solenoid or circuit (1984 to 1988 carbureted) |
| 25 | Manifold vacuum sensor or circuit/coolant temperature sensor or circuit on 1984 models)/float chamber vent solenoid valve or circuit (1983 to 1985) |
| 32 | Coolant temperature sensor or circuit (1983)/Oxygen sensor or circuit (1984 to 1988) |
| 33 | Main system in feedback (1983 to 1988)/Vehicle speed sensor or circuit (1983 to 1985) |
| 34 | Choke power stays on or off (1983)/EGR system solenoid or circuit (1883 to 1988) |
| 35 | Canister purge solenoid or circuit (1983 to 1985) |
| 41 | Vacuum switches stay on or off (1983 only)/Feedback system (California models 1983 to 1985) |
| 42 | Vacuum switches stay on or off (1983 only)/clutch switch or circuit (1983 to 1988) |
| 43 | Choke power stays on or off (1983) |
| 46 | Radiator fan control (1983 to 1985) |
| 52 | Solenoid valve control system or clutch switch |
| 53 | Fuel pump circuit or Altitude compensator switch |
| 54 | Choke control system |
| 55 | Upshift control or EGR sensor |
| 56 | EGR system |
| 62 | Exhaust Gas Recirculation (EGR) solenoid valve control or Idle-up system |
| 63 | Canister solenoid valve or circuit/Idle-up system |
| 64 | Vacuum line control valve or circuit |
| 65 | Float chamber vent control valve circuit |
| 71 | Ignition pulse system |
| 73 | Ignition pulse system |
| 74 | Ignition pulse system |
{mospagebreak}
1984 – 1986 Fuel Injected Subaru Trouble Codes
| Code | Description |
|---|---|
| 11 | Ignition pulse |
| 12 | Starter switch off |
| 13 | Starter switch on |
| 14 | Airflow meter or circuit |
| 15 | Atmospheric pressure switch – fixed value |
| 16 | Crank angle sensor or circuit |
| 17 | Starter switch or circuit |
| 21 | Seized airflow meter flap |
| 22 | Pressure or vacuum switches – fixed value |
| 23 | Idle switch – fixed value |
| 24 | Wide open throttle switch – fixed value |
| 25 | Throttle sensor idle switch or circuit |
| 31 | Speed sensor or circuit |
| 32 | Oxygen sensor or circuit |
| 33 | Coolant sensor or circuit |
| 34 | Abnormal aspirated air thermosensor |
| 35 | Air flow meter/EGR solenoid switch or circuit |
| 41 | Atmospheric pressure sensor or circuit |
| 42 | Fuel injector – fixed value |
| 43 | KDLH control system |
| 46 | Neutral or parking switch or circuit |
| 47 | Fuel injector |
| 53 | Fuel pump or circuit |
| 55 | KDLH control system |
| 57 | Canister control system |
| 58 | Air control system |
| 62 | EGR control system |
| 88 | TBI control unit |
{mospagebreak}
1987 Fuel Injected Subaru Trouble Codes
| Code | Description |
|---|---|
| 11 | Ignition pulse/crank angle sensor |
| 12 | Starter switch or circuit |
| 13 | Crank angle sensor or circuit |
| 14 | Injectors 1 and 2 |
| 15 | Injectors 3 and 4 |
| 21 | Coolant temperature sensor or circuit |
| 22 | Knock sensor or circuit |
| 23 | Air flow meter or circuit |
| 24 | Air control |
| 31 | Throttle sensor or circuit |
| 32 | Oxygen sensor or circuit |
| 33 | Vehicle Speed Sensor (VSS) or circuit |
| 34 | EGR solenoid valve stuck on or off |
| 35 | Purge control solenoid or circuit |
| 41 | Lean fuel mixture indicated |
| 42 | Idle switch or circuit |
| 45 | Kick-down relay or circuit |
| 51 | Neutral switch or curcuit |
| 61 | Parking switch or circuit |
{mospagebreak}
1988 Fuel Injected Subaru Trouble Codes
| Code | Description |
|---|---|
| 11 | Crank angle sensor or circuit |
| 12 | Starter switch or circuit |
| 13 | Crank angle sensor or circuit |
| 14 | Fuel injector – abnormal output |
| 21 | Coolant temperature or circuit |
| 23 | Air flow meter or circuit |
| 24 | Air control valve or circuit |
| 31 | Throttle sensor or circuit |
| 32 | Oxygen sensor or circuit |
| 33 | Vehicle Speed Sensor or circuit |
| 34 | EGR solenoid or circuit |
| 35 | Purge control solenoid or circuit |
| 42 | Idle switch or circuit |
| 45 | Kick-down control relay or circuit |
| 51 | Neutral switch continuously in the on position |
| 55 | EGR temperature sensor or circuit |
| 61 | Parking switch or circuit |
{mospagebreak}
1988 MPFI Subaru Trouble Codes
| Code | Description |
|---|---|
| 11 | Crank angle sensor or circuit |
| 12 | Starter switch or circuit |
| 13 | Cam position sensor or circuit (TDC sensor on Justy) |
| 14 | Fuel injector no. 1 (Legacy, Impreza, Justy, SVX); Fuel injector 1 and 2 (XT, Loyale, GL, DL) |
| 15 | Fuel injector no. 2 (Legacy, Impreza, Justy, SVX); Fuel injector 3 and 4 (Loyale, GL, DL); Fuel injector 5 and 6 (XT6) |
| 16 | Fuel injector no. 3 (Legacy, Impreza, Justy, SVX); Fuel injector 3 and 4 (XT) |
| 17 | Fuel injector no. 4 (Legacy, Impreza, SVX); Fuel injector 1 and 2 (XT6) |
| 18 | Fuel injector no. 5 (SVX) |
| 19 | Fuel injector no. 6 (SVX) |
| 21 | Coolant temperature sensor or circuit |
| 22 | Knock sensor or circuit (right side on SVX) |
| 23 | Air flow meter or circuit (exc. Justy); Pressure sensor (Justy) |
| 24 | Air control valve or circuit (exc. Justy); Idle speed control solenoid valve (Justy) |
| 25 | Fuel Injector 3 and 4 (XT6) |
| 26 | Air temperature sensor (Justy) |
| 28 | Knock sensor no. 2 (SVX, left side) |
| 29 | Crank angle sensor (SVX, no. 2) |
| 31 | Throttle position sensor or circuit |
| 32 | Oxygen sensor or circuit (no. 1, right side on SVX) |
| 33 | Vehicle speed sensor (VSS) or circuit |
| 34 | EGR solenoid valve |
| 35 | Canister purge solenoid or circuit |
| 36 | Air suction solenoid valve (Impreza); Igniter circuit (Justy) |
| 37 | Oxygen sensor (no. 2, left side , SVX) |
| 38 | Engine torque control (SVX) |
| 41 | Air/fuel adaptive control |
| 42 | Idle switch or circuit |
| 43 | Throttle switch (Justy) |
| 44 | Wastegate duty solenoid (turbo) |
| 45 | Pressure duty solenoid (turbo)/atmospheric pressure sensor circuit (non-turbo) |
| 49 | Airflow sensor |
| 51 | Neutral switch (manual transmission)/inhibitor switch (automatic transmission) |
| 52 | Parking brake switch (exc. Justy)/Clutch switch (Justy) |
| 55 | EGR temperature sensor |
| 56 | EGR system |
| 61 | Parking brake switch (Loyale)/Fuel tank pressure control solenoid valve (Impreza) |
| 62 | Fuel temperature sensor (Impreza)/Electric load signal (Justy) |
| 63 | Fuel tank pressure sensor (Impreza)/Blower fan switch (Justy) |
| 65 | Vacuum pressure sensor |
