Subaru Fault Codes
Subaru Fault Codes

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

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