Subaru check engine list / fault code / trouble code

Trouble Codes


83 - 88 Subaru carb models
11Ignition pulse system/crank angle sensor(87 & later)
12Ignition pulse system (1983 only)/Starter switch (84 & later)
13Crank angle sensor or circuit
14Vacuum switches stay on or off (1983 only)/Duty solenoid or circuit(1983 to 1985)/Injectors 1 & 2 (87-up)
15Solenoid valve stays on or off (1983 only)/Coasting Fuel Cut (CFC) system (1983 to 1985 )
16Feedback system (1983 to 1985 models)
17Fuel pump and automatic choke (1983 to 1985 carbureted)
21Ignition pulse system (1983 only)/coolant temperature sensor or circuit (1983 to 1985 carbureted)
22Ignition pulse system (1983 only)/Vehicle speed sensor or circuit or VLC solenoid valve or circuit. (1984 to 1988 carbureted)
23Oxygen sensor or circuit (1983 to 1988)/pressure sensor or circuit (1983 to 1985)
24Vacuum switches stay on or off (1983 only)/coolant temperature sensor or circuit, or Idle-up solenoid or circuit (1984 to 1988 carbureted)
25Manifold vacuum sensor or circuit/coolant temperature sensor or circuit on 1984 models)/float chamber vent solenoid valve or circuit (1983 to 1985)
32Coolant temperature sensor or circuit (1983)/Oxygen sensor or circuit (1984 to 1988)
33Main system in feedback (1983 to 1988)/Vehicle speed sensor or circuit (1983 to 1985)
34Choke power stays on or off (1983)/EGR system solenoid or circuit (1883 to 1988)
35Canister purge solenoid or circuit (1983 to 1985)
41Vacuum switches stay on or off (1983 only)/Feedback system (California models 1983 to 1985)
42Vacuum switches stay on or off (1983 only)/clutch switch or circuit (1983 to 1988)
43Choke power stays on or off (1983)
46Radiator fan control (1983 to 1985)
52Solenoid valve control system or clutch switch
53Fuel pump circuit or Altitude compensator switch
54Choke control system
55Upshift control or EGR sensor
56EGR system
62Exhaust Gas Recirculation (EGR) solenoid valve control or Idle-up system
63Canister solenoid valve or circuit/Idle-up system
64Vacuum line control valve or circuit
65Float chamber vent control valve circuit
71Ignition pulse system
73Ignition pulse system
74Ignition pulse system

84 - 86 Fuel Injected models
11Ignition pulse
12Starter switch off
13Starter switch on
14Airflow meter or circuit
15Atmospheric pressure switch - fixed value
16Crank angle sensor or circuit
17Starter switch or circuit
21Seized airflow meter flap
22Pressure or vacuum switches - fixed value
23Idle switch - fixed value
24Wide open throttle switch - fixed value
25Throttle sensor idle switch or circuit
31Speed sensor or circuit
32Oxygen sensor or circuit
33Coolant sensor or circuit
34Abnormal aspirated air thermosensor
35Air flow meter/EGR solenoid switch or circuit
41Atmospheric pressure sensor or circuit
42Fuel injector - fixed value
43KDLH control system
46Neutral or parking switch or circuit
47Fuel injector
53Fuel pump or circuit
55KDLH control system
57Canister control system
58Air control system
62EGR control system
88TBI control unit
87 Fuel Injected models
11Ignition pulse/crank angle sensor
12Starter switch or circuit
13Crank angle sensor or circuit
14Injectors 1 and 2
15Injectors 3 and 4
21Coolant temperature sensor or circuit
22Knock sensor or circuit
23Air flow meter or circuit
24Air control
31Throttle sensor or circuit
32Oxygen sensor or circuit
33Vehicle Speed Sensor (VSS) or circuit
34EGR solenoid valve stuck on or off
35Purge control solenoid or circuit
41Lean fuel mixture indicated
42Idle switch or circuit
45Kick-down relay or circuit
51Neutral switch or curcuit
61Parking switch or circuit
88 and later models with Single-Point Fuel Injection
11Crank angle sensor or circuit
12Starter switch or circuit
13Crank angle sensor or circuit
14Fuel injector - abnormal output
21Coolant temperature or circuit
23Air flow meter or circuit
24Air control valve or circuit
31Throttle sensor or circuit
32Oxygen sensor or circuit
33Vehicle Speed Sensor or circuit
34EGR solenoid or circuit
35Purge control solenoid or circuit
42Idle switch or circuit
45Kick-down control relay or circuit
51Neutral switch continuously in the on position
55EGR temperature sensor or circuit
61Parking switch or circuit
1988 and later models with Multi-Point Fuel Injection (including Legacy)
11Crank angle sensor or circuit
12Starter switch or circuit
13Cam position sensor or circuit (TDC sensor on Justy)
14Fuel injector no. 1 (Legacy, Impreza, Justy, SVX); Fuel injector 1 and 2 (XT, Loyale, GL, DL)
15Fuel injector no. 2 (Legacy, Impreza, Justy, SVX); Fuel injector 3 and 4 (Loyale, GL, DL); Fuel injector 5 and 6 (XT6)
16Fuel injector no. 3 (Legacy, Impreza, Justy, SVX); Fuel injector 3 and 4 (XT)
17Fuel injector no. 4 (Legacy, Impreza, SVX); Fuel injector 1 and 2 (XT6)
18Fuel injector no. 5 (SVX)
19Fuel injector no. 6 (SVX)
21Coolant temperature sensor or circuit
22Knock sensor or circuit (right side on SVX)
23Air flow meter or circuit (exc. Justy); Pressure sensor (Justy)
24Air control valve or circuit (exc. Justy); Idle speed control solenoid valve (Justy)
25Fuel Injector 3 and 4 (XT6)
26Air temperature sensor (Justy)
28Knock sensor no. 2 (SVX, left side)
29Crank angle sensor (SVX, no. 2)
31Throttle position sensor or circuit
32Oxygen sensor or circuit (no. 1, right side on SVX)
33Vehicle speed sensor (VSS) or circuit
34EGR solenoid valve
35Canister purge solenoid or circuit
36Air suction solenoid valve (Impreza); Igniter circuit (Justy)
37Oxygen sensor (no. 2, left side , SVX)
38Engine torque control (SVX)
41Air/fuel adaptive control
42Idle switch or circuit
43Throttle switch (Justy)
44Wastegate duty solenoid (turbo)
45Pressure duty solenoid (turbo)/atmospheric pressure sensor circuit (non-turbo)
49Airflow sensor
51Neutral switch (manual transmission)/inhibitor switch (automatic transmission)
52Parking brake switch (exc. Justy)/Clutch switch (Justy)
55EGR temperature sensor
56EGR system
61Parking brake switch (Loyale)/Fuel tank pressure control solenoid valve (Impreza)
62Fuel temperature sensor (Impreza)/Electric load signal (Justy)
63Fuel tank pressure sensor (Impreza)/Blower fan switch (Justy)
65Vacuum 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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