Subaru Fault Codes

TROUBLE CODES: 

1983 - 1988 Subaru carb models  


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


1984 - 1986 Fuel Injected models  


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 


87 Fuel Injected models

1987 Fuel Injected models

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 


88 and later models with Single-Point Fuel Injection  


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



1988+ Models with Multi-Point Fuel Injection (including Legacy)



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



Subaru OBD2 Codes



P0031 - Front oxygen (A/F) sensor heater circuit low input


P0032 - Front oxygen (A/F) sensor heater circuit high input


P0037 - Rear oxygen sensor heater circuit malfunction


P0038 - Rear oxygen sensor heater circuit high input


P0065 - Air assist injector solenoid valve malfunction


P0066 - Air assist injector solenoid valve circuit low input


P0067 - Air assist injector solenoid valve circuit high input


P0100 - Mass Air Flow Sensor Circuit Malfunction


P0101 - Mass Air Flow Sensor Circuit Range Problem


P0102 - Mass Air Flow Sensor Circuit Low Input


PO103 - Mass Air Flow Sensor Circuit High Input


P0105 - Pressure Sensor Circuit Malfunction


P0106 - Pressure Sensor Circuit Range Problem


PO107 - Pressure Sensor Circuit Low Input


PO108 - Pressure Sensor Circuit High Input


P0111 - Intake air temperature sensor circuit range/performance problem


P0112 - Intake air temperature sensor circuit low input


P0113 - Intake air temperature sensor circuit high input


P0115 - Engine Coolant Temperature Sensor Circuit


P0116 - Engine Coolant Temp Sensor Circuit Low Input


PO117 - Engine Coolant Temp Sensor Circuit Low Input


PO118 - Engine Coolant Temp Sensor Circuit High Input


P0120 - Throttle Position Sensor Circuit Malfunction


P0121 - Throttle Position Sensor Circuit Range Problem


PO122 - Throttle Position Sensor Circuit Range Problem


PO123 - Throttle Position Sensor Circuit High Input


P0125 - Insufficient Coolant Temperature for Closed Loop


P0128 - Thermostat malfunction


P0130 - Front Oxygen Sensor Circuit Malfunction


P0131 - Front oxygen (A/F) sensor circuit range/performance problem (low input)


P0132 - Front oxygen (A/F) sensor circuit range/performance problem (high input)


P0133 - Front Oxygen Sensor Circuit Slow Response


P0135 - Front Oxygen Sensor Heater Circuit Malfunction


P0136 - Rear Oxygen Sensor Circuit Malfunction


P0139 - Rear Oxygen Sensor Circuit Slow Response


P0141 - Rear Oxygen Sensor Heater Circuit Malfunction


P0170 - Fuel Trim Malfunction


P0171 - Fuel trim malfunction (A/F too lean)


P0172 - Fuel trim malfunction (A/F too rich)


PO181 - Fuel Temperature Sensor A Range Problem


PO182 - Fuel Temperature Sensor A Circuit Low Input


PO183 - Fuel Temperature Sensor A Circuit High Input


P0201 - Fuel Injector Circuit Malfunction - #1


P0202 - Fuel Injector Circuit Malfunction - #2


P0203 - Fuel Injector Circuit Malfunction - #3


P0204 - Fuel Injector Circuit Malfunction - #4


P0244 - Wastegate control solenoid valve malfunction (high input)


P0245 - Wastegate control solenoid valve circuit low input


P0246 - Wastegate control solenoid valve circuit high input


PO261 - Fuel Injector Circuit Low Input - #1


PO262 - Fuel Injector Circuit High Input - #1


PO264 - Fuel Injector Circuit Low Input - #2


PO265 - Fuel Injector Circuit High Input - #2


PO267 - Fuel Injector Circuit Low Input - #3


PO268 - Fuel Injector Circuit High Input - #3


PO270 - Fuel Injector Circuit Low Input - #4


PO271 - Fuel Injector Circuit High Input - #4


P0301 - Cylinder 1 Misfire Detected


P0302 - Cylinder 2 Misfire Detected


P0303 - Cylinder 3 Misfire Detected


P0304 - Cylinder 4 Misfire Detected


P0325 - Knock Sensor Circuit Malfunction


P0327 - Knock sensor circuit low input


P0328 - Knock sensor circuit high input


P0335 - Crankshaft Position Sensor Circuit Malfunction


PO336 - Crankshaft Position Sensor Circuit Range Problem


P0340 - Camshaft Position Sensor Circuit Malfunction


PO341 - Camshaft Position Sensor Circuit Range Problem


P0400 - Exhaust Gas Recirculation Flow Malfunction


P0403 - Exhaust Gas Recirculation Circuit Malfunction


PO420 - Catalyst System Efficiency Below Threshold


PO440 - Evaporative Emission Control System Malfunction


P0441 - Evap System Incorrect Purge Flow


P0442 - Evaporative emission control system malfunction


P0443 - Evap System Purge Control Valve Circuit


PO443 - EVAP System Purge Control Valve Circuit Low Input


P0444 - Evaporative emission control system purge control valve circuit low input


P0445 - Evaporative emission control system purge control valve circuit high input


PO446 - EVAP System Vent Control Low Input


P0447 - Evaporative emission control system vent control low input


P0448 - Evaporative emission control system vent control high input


PO451 - EVAP Pressure Sensor Range Problem


PO452 - EVAP Pressure Sensor Low Input


PO453 - EVAP Pressure Sensor High Input


P0456 - Evaporative emission control system malfunction


PO461 - Fuel Level Sensor Circuit Range/Performance Problem


PO462 - Fuel Level Sensor Circuit Low Input


PO463 - Fuel Level Sensor Circuit High Input


P0464 - Fuel level sensor intermittent input


P0480 - Cooling Fan Relay 1 Circuit Low Input


P0483 - Cooling Fan Function Problem


P0500 - Vehicle Speed Sensor Malfunction


P0505 - Idle Control System Malfunction


P0506 - Idle Control System RPM Lower Than Expected


P0507 - Idle Control System RPM Higher Than Expected


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


P0600 - Serial Communication Link Malfunction


P0601 - Internal Control Module Memory Checksum Error


P0604 - Internal control module memory check sum error


P0703 - Brake Switch Input Malfunction


P0705 - Transmission Range Sensor Circuit Malfunction


P0710 - Transmission Fluid Temperature Sensor Circuit


P0715 - Torque Converter Turbine Speed Sensor Circuit Malfunction


P0720 - Output Speed Sensor Circuit Malfunction


P0725 - Engine Speed Input Circuit Malfunction


P0731 - Gear 1 Incorrect Ratio


P0732 - Gear 2 Incorrect Ratio


P0733 - Gear 3 Incorrect Ratio


P0734 - Gear 4 Incorrect Ratio


P0740 - Torque Converter Clutch System Malfunction


P0741 - Torque converter clutch system malfunction


P0743 - Torque Converter Clutch System Electrical


P0748 - Pressure Control Solenoid Electrical


P0753 - Shift Solenoid A Electrical


P0758 - Shift Solenoid B Electrical


P0760 - Shift Solenoid C Malfunction


P0763 - Shift Solenoid C Electrical


P0778 - 2-4 brake pressure control solenoid valve (2-4 brake duty solenoid) circuit malfunction


P0785 - 2-4 brake timing control solenoid valve (2-4 brake timing solenoid) circuit malfunction


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