Subaru Manufacturer-specific OBD2 Trouble Codes List – OBDCodex

A Subaru manufacturer-specific OBD2 codes list provides diagnostic codes specific to Subaru vehicles. The list includes a brief description of each code, which it’s helpful for mechanics and DIY enthusiasts to have a list for accurate diagnosis and repair.

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2. Subaru Manufacturer-specific OBD2 Codes List 1
CODES DEFINITION
Subaru B1100 Integ. Unit System Error
Subaru B1101 Batt P/Supply Malfunction
Subaru B1102 Batt P/Supply Malfunction Backup
Subaru B1103 Ignition Power Failure
Subaru B1104 ACC Power Failure
Subaru B1105 Key Interlock Circuit Abnormal
Subaru B1106 Shift Lock Circuit Failure
Subaru B1401 M Collation NG
Subaru B1402 Immobilizer Key Collation NG
Subaru B1403 E/G request NG
Subaru B1500 Keyless UART Communication Failure
Subaru P1086 Tumble Generated Valve Position Sensor 2 Circuit Low
Subaru P1087 Tumble Generated Valve Position Sensor 2 Circuit High
Subaru P1088 Tumble Generated Valve Position Sensor 1 Circuit Low
Subaru P1089 Tumble Generated Valve Position Sensor 1 Circuit High
Subaru P1090 Tumble Generated Valve System 1 (valve open)
Subaru P1091 Tumble Generated Valve System 1 (valve closed)
Subaru P1092 Tumble Generated Valve System 2 (valve open)
Subaru P1093 Tumble Generated Valve System 2 (valve closed)
Subaru P1094 Tumble Generated Valve Signal 1 Circuit Malfunction
Subaru P1095 Tumble Generated Valve Signal 1 Circuit Malfunction (short)
Subaru P1096 Tumble Generated Valve Signal 2 Circuit Malfunction (open)

3. Subaru Manufacturer-specific OBD2 Codes List 2
CODES DEFINITION
Subaru P1097 Tumble Generated Valve Signal 2 Circuit Malfunction (short)
Subaru P1100 Starter Switch Circuit Malfunction
Subaru P1101 Neutral Position Switch Circuit Malfunction
Subaru P1102 Pressure Sources Switching Solenoid Valve Circuit Malfunction
Subaru P1103 Engine Torque Control Signal Circuit Malfunction
Subaru P1106 Engine Torque Control Signal 2 Circuit
Subaru P1107
Air Injection System Diagnosis Solenoid Valve Circuit
Malfunction
Subaru P1108 Induction Control Solenoid Valve Circuit Malfunction
Subaru P1110 Atmospheric Pressure Sensor Circuit Low Input
Subaru P1111 Atmospheric Pressure Sensor Circuit High Input
Subaru P1112
Atmospheric Pressure Sensor Circuit Range/Performance
Problem
Subaru P1115 Engine Torque Control Cut Signal Circuit High Input
Subaru P1116 Engine Torque Control Cut Signal Circuit Low Input
Subaru P1120 Starter Circuit Switch High Input
Subaru P1121 Starter Circuit Switch High Input
Subaru P1122 Pressure Sources Switching Solenoid Valve High Input
Subaru P1130 Front Oxygen Sensor Circuit Malfunction
Subaru P1131 Front Oxygen Sensor Circuit Malfunction (short circuit)
Subaru P1132 Front Oxygen Sensor Heater Circuit Low Input
Subaru P1133 Front Oxygen Sensor Heater Circuit High Input
Subaru P1134 Front Oxygen Sensor Micro Computer Problem

4. Subaru Manufacturer-specific OBD2 Codes List 3
CODES DEFINITION
Subaru P1137 O2 Sensor Circuit (bank 1 sensor 1)
Subaru P1139
Front Oxygen Sensor 1 Heater Circuit Range/Performance
Problem
Subaru P1140
Bank 2 and Sensor 1 Oxygen Sensor (front left) Heater Circuit
Range/ Performance Problem
Subaru P1141
Mass Air Flow Sensor Circuit Range/Performance Problem (high
output)
Subaru P1142
Throttle Position Sensor Circuit Range/Performance Problem
(low input)
Subaru P1143 Pressure Sensor Circuit range/Performance Problem (low input)
Subaru P1144
Pressure Sensor Circuit range/Performance Problem (high
input)
Subaru P1146
Pressure Sensor Circuit range/Performance Problem (high
input)
Subaru P1151 Rear Oxygen Sensor Heater Circuit High Input
Subaru P1152 O2 Sensor Range/Performance (Low) (Bank 1 Sensor 1)
Subaru P1153 O2 Sensor Circuit Range/Performance (High) (Bank 1 Sensor 1)
Subaru P1154
Bank 1 and Sensor 1 Oxygen Sensor (front left) Circuit
Range/Performance Problem low Input
Subaru P1155
Bank 2 and Sensor 1 Oxygen Sensor (front left) Circuit
Range/Performance Problem High Input
Subaru P1160 Return Spring Failure
Subaru P1207 Air Assist Injector Solenoid Valve Circuit Low Input
Subaru P1208 Air Assist Injector Solenoid Valve Circuit high Input
Subaru P1301 Misfire Detected (high temperature exhaust gas)
Subaru P1312 Exhaust Gas Temperature Sensor malfunction
Subaru P1325 Knock Sensor Circuit Low Input

5. Subaru Manufacturer-specific OBD2 Codes List 4
CODES DEFINITION
Subaru P1400 Fuel Tank Pressure Control Solenoid Valve Circuit Low
Subaru P1410 Secondary Air Injection System Switching Valve Stuck Open
Subaru P1418 Secondary Air Injection System Control “A” Circuit Shorted
Subaru P1420 Fuel Tank Pressure Control Solenoid Valve Circuit High
Subaru P1421 Exhaust Gas Recirculation Circuit High Input
Subaru P1422
Evaporative Emission Control System Purge Control Valve
Circuit High Input
Subaru P1423 Evaporative Emission Control System Vent Control High Input
Subaru P1440
Fuel Tank Pressure Control System Function Problem (low
input)
Subaru P1441
Fuel Tank Pressure Control System Function Problem (high
input)
Subaru P1442 Fuel level Sensor Circuit Range/Performance Problem 2
Subaru P1443 Vent Control Solenoid Valve Function Problem
Subaru P1445 Air Assist Injector Solenoid Valve malfunction
Subaru P1446 Fuel Tank Sensor Control Valve Circuit Low
Subaru P1447 Fuel Tank Sensor Control Valve Circuit High
Subaru P1448 Fuel Tank Sensor Control Valve Range/Performance
Subaru P1449 Evaporative Emission Cont. Sys. Air Filter Clog
Subaru P1451 Evaporative Emission Control System (Large Leak Detected)
Subaru P1480 Cooling Fan Relay 1 Circuit High Input
Subaru P1490 Thermostat Malfunction
Subaru P1491 Positive Crankcase Ventilation (Blow-by) Function Problem
Subaru P1492 EGR Solenoid Valve Signal #1 Circuit Malfunction (low input)

6. Subaru Manufacturer-specific OBD2 Codes List 5
CODES DEFINITION
Subaru P1493 EGR Solenoid Valve Signal #1 Circuit Malfunction (High Input)
Subaru P1494 EGR Solenoid Valve Signal #2 Circuit Malfunction (Low Input)
Subaru P1495 EGR Solenoid Valve Signal #2 Circuit Malfunction (High Input)
Subaru P1496 EGR Solenoid Valve Signal #3 Circuit Malfunction (Low Input)
Subaru P1497 EGR Solenoid Valve Signal #3 Circuit Malfunction (High Input)
Subaru P1498 EGR Solenoid Valve Signal #4 Circuit Malfunction (Low Input)
Subaru P1499 EGR Solenoid Valve Signal #4 Circuit Malfunction (High Input)
Subaru P1500 Radiator Fan Relay 1 Circuit malfunction (fan 1)
Subaru P1502 Radiator Fan Function Problem
Subaru P1505 Idle Control System Circuit High Input
Subaru P1507 Idle Control System Malfunction (fail safe)
Subaru P1510 ISC Solenoid Valve Signal No. 1 Circuit Malfunction (low input)
Subaru P1511 ISC Solenoid Valve Signal No. 1 Circuit Malfunction (high input)
Subaru P1512 ISC Solenoid Valve Signal No. 2 Circuit Malfunction (low input)
Subaru P1513 ISC Solenoid Valve Signal No. 2 Circuit Malfunction (high input)
Subaru P1514 ISC Solenoid Valve Signal No. 3 Circuit Malfunction (low input)
Subaru P1515 ISC Solenoid Valve Signal No. 3 Circuit Malfunction (high input)
Subaru P1516 ISC Solenoid Valve Signal No. 4 Circuit Malfunction (low input)
Subaru P1517 ISC Solenoid Valve Signal No. 4 Circuit Malfunction (high input)
Subaru P1518 Starter Switch Circuit Low Input
Subaru P1520 Cooling Fan Relay 1 Circuit High Input
Subaru P1521 Brake Switch Circuit Range

7. Subaru Manufacturer-specific OBD2 Codes List 6
CODES DEFINITION
Subaru P1530 Battery Current Sensor Circuit Low
Subaru P1531 Battery Current Sensor Circuit High
Subaru P1532 Battery Charging System
Subaru P1540 Vehicle Speed Sensor Malfunction 2
Subaru P1544 Exhaust Gas Temperature Too High
Subaru P1560 Back-up Voltage Circuit Malfunction
Subaru P1570 Antenna
Subaru P1571 Reference Code Incompatibility
Subaru P1572 IMM Circuit Failure (Except Antenna Circuit)
Subaru P1574 Key Communication Failure
Subaru P1576 EGI Control Module EEPROM
Subaru P1577 IMM Control Module EEPROM
Subaru P1578 Meter Failure
Subaru P1590 Neutral Position Switch Circuit High Output
Subaru P1591 Neutral Position Switch Circuit Low Output
Subaru P1594 Automatic Transaxle Diagnosis Input Signal Circuit Malfunction
Subaru P1595 Automatic Transaxle Diagnosis Input Signal Circuit Low Input
Subaru P1596 Automatic Transaxle Diagnosis Input Signal Circuit High Input
Subaru P1602 Control Module Programming Error
Subaru P1698 Engine Torque Control Cut Signal Circuit Malfunction (low input)
Subaru P1699
Engine Torque Control Cut Signal Circuit Malfunction (high
input)

8. Subaru Manufacturer-specific OBD2 Codes List 7
CODES DEFINITION
Subaru P1700
Throttle Position Sensor Circuit Malfunction For Automatic
Transmission
Subaru P1701
Cruise Control Set Signal Circuit Malfunction For Automatic
Transmission
Subaru P1702
Automatic Transmission Diagnosis Input Signal Circuit
Malfunction
Subaru P1703 Low Clutch Timing Control Solenoid Valve Circuit Malfunction
Subaru P1704 2-4 Brake Timing Control Solenoid Valve Circuit Malfunction
Subaru P1705
2-4 Brake Pressure Control Solenoid Valve (duty solenoid “D”)
Circuit Malfunction
Subaru P1706 AT Vehicle Speed Sensor Circuit Malfunction (Rear wheel)
Subaru P1707 AT AWD Solenoid Valve Circuit Malfunction
Subaru P1710 Torque Converter Turbine 2 Speed Signal Circuit Malfunction
Subaru P1711 Engine Torque Control Signal No. 1 Circuit Malfunction
Subaru P1712 Engine Torque Control Signal No. 2 Circuit Malfunction
Subaru P1718 AT CAN Communication Circuit
Subaru P1720 DCCD CAN System Circuit
Subaru P1722
Automatic Transmission Diagnosis Input Signal Circuit High
Input
Subaru P1742
Automatic Transmission Diagnosis Input Signal Circuit
Malfunction
Subaru P1767 DCCD Steering Angle Sensor
Subaru P1769 Yaw Rate & Lateral G Sensor Malfunction
Subaru P1817 Sports Mode Switch Circuit (Manual Switch)
Subaru P1840 Transmission Fluid Pressure Sensor Switch A Circuit
Subaru P1841 Transmission Fluid Pressure Sensor Switch B Circuit

9. Subaru Manufacturer-specific OBD2 Codes List 8
CODES DEFINITION
Subaru P1842 Transmission Fluid Pressure Sensor Switch C Circuit
Subaru P1843 Transmission Fluid Pressure Sensor Switch D Circuit
Subaru P1844 Transmission Fluid Pressure Sensor Switch E Circuit
Subaru P1875 Circuit of Center Diff
Subaru U1201 CAN-HS Counter Abnormal
Subaru U1202 CAN-HS Bus Off
Subaru U1211 CAN-HS ECM Data Abnormal
Subaru U1212 CAN-HS TCM Data Abnormal
Subaru U1213 CAN-HS VDC/ABS Data Abnormal
Subaru U1221 CAN-HS ECM No-Receive Data
Subaru U1222 CAN-HS TCM No-Receive Data
Subaru U1223 CAN-HS VDC/ABS No-Receive Data
Subaru U1300 CAN-LS Malfunction
Subaru U1301 CAN-LS Counter Abnormal
Subaru U1302 CAN-LS Bus Off
Subaru U1311 CAN-LS Meter Unit Data Abnormal
Subaru U1321 CAN-LS Meter No-Receive Data