Subaru OBD / OBD2 Codes >> B9 Tribeca 3.0/3.5L – Baja – Forester – Impreza – Legacy/Outback (1995 – 2008)

ModeL Year Engine identification System
B9 Tribeca 3.0/3.5L 2006-08 VIN  code digit 6 =  8/9 MFI/MPI
Baja 2.5L 16V 2003-06 VIN  code digit 6 =  6
Baja 2.5L Turbo 2004-06 VIN  code digit 6 =  6
Forester 2.5L 16V 1998-07 VIN  code digit 6 =  6
Forester 2.5L Turbo 2004-07 VIN  code digit 6 =  6
Impreza 1.8L 1995-97 VIN  code digit 6 =  2
Impreza 2.0L Turbo 2002-04 VIN  code digit 6 =  2
Impreza 2.2L 16V 1996-01 VIN  code digit 6 =  4
Impreza 2.5L 16V 1998-07 VIN  code digit 6 =  6
Impreza 2.5L Turbo 2004-07 VIN  code digit 6 =  7
Legacy 2.2L 16V 1995-99 VIN  code digit 6 =  4
Legacy/Outback 2.5L  16V 1996-07 VIN  code digit 6 =  6
Legacy/Outback 2.5L Turbo 2005-07 VIN  code digit 6 =  6
Legacy/Outback 3.0L 2002-08 VIN  code digit 6 =  8

General information

  • Engine control module (ECM) incorporates self-diagnosis function.
  • Malfunction indicator lamp (MIL) will illuminate if certain faults are recorded.
  • ECM operates in backup mode if sensors fail, to enable vehicle to be driven to workshop.

Accessing

  • Trouble codes can be displayed by using a Scan Tool connected to the data link connector (DLC):
o lmpreza ->1997/Legacy ->1999/0utback ->1999 [1].
o Forester/lmpreza 1998-01 [2]
o lmpreza 2002->[3]
o Baja/Legacy 2000 ->/Outback 2000->[4]
o B9 Tribeca [5]

Erasing – models ->2002

  • Trouble codes can be erased by using a Scan Tool connected to the data link connector (DLC) or as follows:
  • Ensure ignition switched OFF.
  • Disconnect battery ground cable for 30 seconds minimum.
  • Reconnect battery ground cable.

NOTE: Disconnecting battery ground lead will erase trouble codes but may also erase memory from electronic units such as radio.

Erasing – models 2003->

  • Trouble codes can only be erased by using a Scan Tool connected to the data link connector (DLC).

Trouble code  identification

OBD-11 code Fault location Probable cause
PO,P2,UO Refer to OBD-11 trouble code tables
P1086 Intake manifold air control actuator position sensor, LH – voltage low Wiring, intake manifold air control actuator position sensor, ECM
P1087 Intake manifold air control actuator position sensor, LH – voltage high Wiring, intake manifold air control actuator position sensor, ECM
P1088 Intake manifold air control actuator position sensor, RH – voltage low Wiring, intake manifold air control actuator position sensor, ECM
P1089 Intake manifold air control actuator position sensor, RH – voltage high Wiring, intake manifold air control actuator position sensor, ECM
P1090 Intake manifold air control actuator, RH – stuck open Wiring, intake manifold air control actuator position sensor, ECM
P1091 Intake manifold air control actuator, RH – stuck closed Wiring, intake manifold air control actuator position sensor, ECM
P1092 Intake manifold air control actuator, LH – stuck open Wiring, intake manifold air control actuator position sensor, ECM
P1093 Intake manifold air control actuator, LH – stuck closed Wiring, intake manifold air control actuator position sensor, ECM
P1094 Intake manifold air control actuator, RH – open circuit Wiring, intake manifold air control actuator position sensor, ECM
P1095 Intake manifold air control actuator, RH – over currenVshort circuit Wiring, intake manifold air control actuator position sensor, ECM
P1096 Intake manifold air control actuator, LH – open circuit Wiring, intake manifold air control actuator position sensor, ECM
P1097 Intake manifold air control actuator, LH – over currenVshort circuit Wiring, intake manifold air control actuator position sensor, ECM
P1100 Starter signal – circuit malfunction Starter motor circuit, NPITR switch, CPP   switch, ECM
P1101 Neutral position (NP) switch – MT – circuit malfunction Wiring, NP switch, ECM
P1101 Park/neutral position (PNP) switch – circuit malfunction Wiring, PNP switch, ECM
P1102 MAP/BARO sensor switching valve – circuit malfunction Wiring, MAP/BARO sensor switching valve, ECM
P1103 Engine torque control signal 1 – circuit malfunction Wiring, ECM, TCM
P1104 Traction control signal – circuit malfunction Wiring, traction control module
P1106 Engine torque control signal 2 – circuit malfunction Wiring, ECM, TCM
P1107 Secondary air injection (AIR) diagnosis solenoid – circuit malfunction Wiring, AIR diagnosis solenoid, ECM
P1110 Barometric pressure (BARO) sensor- voltage low Wiring, BARO sensor, ECM
P1111 Barometric pressure (BARO) sensor- voltage high Wiring, BARO sensor, ECM
P1112 Barometric pressure (BARO) sensor- range/performance problem Wiring, BARO sensor, ECM
P1115 Engine torque control cut signal – voltage high Wiring, ECM, TCM
P1116 Engine torque control cut signal – voltage low Wiring, ECM, TCM
P1120 Starter signal – voltage high Starter motor circuit, wiring short to positive, ECM
P1121 Park/neutral position (PNP) switch/neutral position (NP) switch – voltage low Wiring short to ground, selector cable, PNP   switch, ECM
P1122 MAP/BARO sensor switching valve- voltage high Wiring open/short to positive, MAP/BARO   sensor switching valve, ECM
P1124 Traction control signal – voltage high Wiring open/short to positive
P1130 Heated oxygen sensor (H02S) 1 -open circuit Wiring, H02S, ECM
P1131 Heated oxygen sensor (H02S) 1 -short circuit Wiring, H02S, ECM
P1132 Heated oxygen sensor (H02S) 1 -voltage low Wiring, H025, ECM
P1133 Heated oxygen sensor (H02S) 1 – voltage high Wiring, H025, ECM
P1134 Engine control module (ECM) ECM
P1137 Heated oxygen sensor (H02S) 1 – range/performance problem Wiring, H025, ECM
P1139 Heated oxygen sensor (H02S) 1, heater control – range/performance problem Wiring, H02S, ECM
P1140 Heated oxygen sensor (H02S) 1, bank 2, heater – range/performance problem Wiring, H025, ECM
P1141 Mass air flow (MAF) sensor – range/performance problem voltage high MAF sensor
P1142 Throttle position (TP) sensor – range/performance problem voltage low TP sensor
P1143 MAP/BARO sensor – range/performance problem voltage low Hose leak/blockage, MAP/BARO sensor, MAP/BARO sensor switching solenoid
P1144 Manifold absolute pressure (MAP) sensor/barometric pressure (BARO) sensor- range/performance problem voltage high MAP/BARO sensor
P1146 Manifold absolute pressure (MAP) sensor – range/performance problem voltage high Wiring, MAP sensor, TP sensor
P1150 Heated oxygen sensor (H02S) 1, heater- voltage high Wiring, H025, ECM
P1151 Heated oxygen sensor (H02S) 2 – voltage high Wiring, H02S, ECM
P1152 Heated oxygen sensor (H02S) 1, bank 1 – range/performance problem voltage low Wiring, H02S, ECM
P1153 Heated oxygen sensor (H02S) 1, bank 1 – range/performance problem voltage high Wiring, H025, ECM
P1154 Heated oxygen sensor (H02S) 1, bank 2 – range/performance problem voltage low Wiring, H02S, ECM
P1155 Heated oxygen sensor (H02S) 1, bank 2 – range/performance problem voltage high Wiring, H02S, ECM
P1160 Throttle actuator control (TAC) – return spring failure Wiring, TAC motor
P1207 Injector air control solenoid – voltage low Wiring, injector air control solenoid, ECM
P1208 Injector air control solenoid – voltage high Wiring, injector air control solenoid, ECM
P1208 Knock sensor (KS)- voltage low Wiring, KS, ECM
P1230 Fuel pump (FP) control module – circuit malfunction Wiring, FP control module, ECM
P1244 Turbocharger (TC) wastegate regulating valve – voltage low Wiring, TC wastegate regulating valve, ECM
P1245 Turbocharger (TC) wastegate regulating valve – failsafe Wiring, TC wastegate regulating valve, ECM
P1301 Exhaust gas temperature sensor – misfire/fire due to increased temperature Repair other DTC’s, replace pre-CAT
P1312 Exhaust gas temperature sensor Wiring, exhaust gas temperature sensor
P1325 Knock sensor (KS) -voltage low Wiring, KS, ECM
P1400 Fuel tank vent valve – circuit malfunction voltage low Wiring open/short to ground, fuel tank vent valve, ECM
P1401 Fuel tank pressure control system – malfunction EVAP system, fuel tank pressure sensor
P1402 Fuel level sensor- circuit malfunction Wiring, instrument cluster, fuel level sensor, ECM
P1410 Secondary air injection (AIR) solenoid – stuck open Wiring, air leaks, AIR solenoid
P1418 Secondary air (AIR) system – circuit malfunction Wiring, AIR pump relay, AIR pump, ECM
P1420 Fuel tank vent valve -circuit malfunction voltage high Wiring open/short to positive, fuel tank vent valve, ECM
P1421 Exhaust gas recirculation (EGR) system – voltage high Wiring open/short to positive, EGR solenoid, ECM
P1422 Evaporative emission (EVAP) canister purge valve – voltage high Wiring open/short to positive, EVAP valve, ECM
P1423 Evaporative emission (EVAP) canister purge system – vent control voltage high Wiring open/short to positive, EVAP vent valve, ECM
P1440 Fuel tank pressure control system – voltage low Fuel tank pressure control solenoid, fuel filler cap, EVAP drain/vent valve, EVAP canister/valve, fuel tank, hose/pipe leak
P1441 Fuel tank pressure control system – voltage high Fuel tank pressure control solenoid, fuel filler cap, EVAP drain/vent valve, EVAP valve, fuel tank, hose/pipe blockage
P1442 Fuel level sensor- range/performance problem Fuel level sensor
P1443 Evaporative emission (EVAP) canister purge valve – vent control malfunction Hose blockage, EVAP canister purge valve
P1445 Injector air control solenoid – circuit malfunction Wiring, injector air control solenoid, ECM
P1446 Evaporative emission (EVAP) canister purge valve – voltage low Wiring, EVAP canister purge valve, ECM
P1447 Evaporative emission (EVAP) canister purge valve – voltage high Wiring, EVAP canister purge valve, ECM
P1448 Evaporative emission (EVAP) canister purge valve – range/performance problem Wiring, EVAP canister purge valve, ECM
P1480 Engine coolant blower motor relay 1 – voltage high Wiring, blower motor relay, ECM
P1490 Thermostat – malfunction Thermostat, cooling system, engine coolant blower motor
P1491 Positive crankcase ventilation (PCV) – malfunction Wiring, hose blocked/leaking
P1492 Exhaust gas recirculation (EGR) solenoid valve – signal 1 – voltage low Wiring, EGR solenoid valve
P1493 Exhaust gas recirculation (EGR) solenoid valve – signal 1 – voltage high Wiring, EGR solenoid valve, ECM
P1494 Exhaust gas recirculation (EGR) solenoid valve – signal 2 – voltage low Wiring, EGR solenoid valve
P1495 Exhaust gas recirculation (EGR) solenoid valve – signal 2 – voltage high Wiring, EGR solenoid valve, ECM
P1496 Exhaust gas recirculation (EGR) solenoid valve – signal 3 – voltage low Wiring, EGR solenoid valve
P1497 Exhaust gas recirculation (EGR) solenoid valve – signal 3 – voltage high Wiring, EGR solenoid valve, ECM
P1498 Exhaust gas recirculation (EGR) solenoid valve – signal 4 – voltage low Wiring, EGR solenoid valve
P1499 Exhaust gas recirculation (EGR) solenoid valve – signal 4 – voltage high Wiring, EGR solenoid valve, ECM
P1500 Engine coolant blower motor relay 1 – circuit malfunction Wiring, blower motor relay, ECM
P1502 Engine coolant blower motor – malfunction Cooling system, radiator ventilation obstructed
P1505 Idle air (lAC) control valve – voltage high Wiring, lAC valve, ECM
P1507 Idle air (lAC) control system – malfunction Intake system, lAC valve
P1510 Idle air (lAC) control valve, circuit 1 – voltage low Wiring, lAC valve, ECM
P1511 Idle air (lAC) control valve, circuit 1 – voltage high Wiring, lAC valve, ECM
P1512 Idle air (lAC) control valve, circuit 2 – voltage low Wiring, lAC valve, ECM
P1513 Idle air (lAC) control valve, circuit 2 – voltage high Wiring, lAC valve, ECM
P1514 Idle air (lAC) control valve, circuit 3 – voltage low Wiring, lAC valve, ECM
P1515 Idle air (lAC) control valve, circuit 3 – voltage high Wiring, lAC valve, ECM
P1516 Idle air (lAC) control valve, circuit 4 – voltage low Wiring, lAC valve, ECM
P1517 Idle air (lAC) control valve, circuit 4 – voltage high Wiring, lAC valve, ECM
P1518 Starter motor switch – circuit malfunction Wiring
P1520 Engine coolant blower motor relay 1 – voltage high Wiring open/short to positive, blower motor relay, ECM
P1540 Vehicle speed sensor (VSS) – malfunction 2 Wiring, instrument cluster, VSS, ECM
P1544 Exhaust gas temperature sensor – increased temperature detected Repair other DTC’s, exhaust system, replace pre-CAT
P1560 Engine control module (ECM) – battery voltage supply Wiring, fuse, ECM
P1570 Immobilizer read coil Wiring, immobilizer read coil, immobilizer control module
P1571 Engine control module (ECM) – incorrect immobilizer code Immobilizer code not programmed
P1572 Immobilizer control module/ECM – circuit malfunction Wiring, immobilizer control module, ECM
P1574 Immobilizer control module – communication error Wiring, key not programmed, immobilizer control module
P1576 Engine control module (ECM) – EEPROM   error ECM
P1577 Immobilizer control module – EEPROM error . Immobilizer control module
P1578 Immobilizer system – incorrect signal Incorrect key has been used
P1590 Park neutral position (PNP) switch – voltage high Wiring, PNP switch, ECM
P1591 Park neutral position (PNP) switch – voltage low Wiring, PNP switch, ECM
P1592 Park neutral position (PNP) switch – circuit malfunction Wiring, PNP switch, ECM
P1594 Transmission control module (TCM) – communication circuit malfunction Wiring, TCM, ECM
P1595 Transmission control module (TCM) – communication circuit voltage low Wiring, TCM, ECM
P1596 Transmission control module (TCM) – communication circuit voltage high Wiring, TCM, ECM
P1602 Engine control module (ECM) – programming error Wiring, other trouble code(s) stored, mechanical fault, incorrect programming, incorrect ECM, ECM
P1698 Engine torque control cut signal – voltage low Wiring, ECM, TCM
P1699 Engine torque control cut signal – voltage high Wiring, ECM, TCM
P1700 AT- throttle position (TP) sensor- circuit malfunction Wiring, TP sensor
P1701 Cruise control set signal – AT- circuit malfunction Wiring, cruise control switch, TCM
P1702 AT diagnosis signal – voltage low Wiring short circuit, TCM
P1703 Shift solenoid (SS) low clutch timing – circuit malfunction Wiring, shift solenoid, TCM
P1704 Shift solenoid (SS) 2-4 brake timing – circuit malfunction Wiring, shift solenoid, TCM
P1705 Shift solenoid (SS) 2-4 brake pressure control – circuit malfunction Wiring, shift solenoid, TCM
P1711 Engine torque control signal 1 -circuit malfunction Wiring, ECM, TCM
P1712 Engine torque control signal 2 – circuit malfunction Wiring, ECM, TCM
P1722 AT diagnosis signal – voltage high Wiring short to positive, TCM, ECM
P1742 Automatic transmission diagnosis signal – circuit malfunction Wiring, TCM