Isuzu OBD / OBD2 Codes >> Amigo 2.2/3.2 – Ascender 4.2/5.3L – Axiom 3.5L – Hombre 2.2/4.3L – i-280/290/350/370 – Rodeo – Trooper – VehiCROSS 3.5L (1996 – 2008)

ModelYearEngine identificationSystem
Amigo 2.2L1998-00X22SE/Y22SEMFI
Amigo 3.2L1998-006VD1MFI
Ascender 4.2/5.3L2003-08VIN  position 8 = P/SMFI
Axiom  3.5L20026VE1MFI
Hombre 2.2/4.3L1996-00VIN  position 8 =  4/W/XMFI
i-280  2.8L2006LK5MFI
i-290 2.9L2007-08LLVMFI
i-350  3.5L2006L52MFI
i-370  3.7L2007-08LLRMFI
Rodeo 2.2L1998-02X22SE/Y22SEMFI
Rodeo 2.6L1996-974ZE1MFI
Rodeo 3.2/3.5L1996-046VD1/6VE-DIMFI
Trooper 3.2L1996-976VD1MFI
Trooper 3.5L1998-026VE1MFI
VehiCROSS  3.5L1999-016VE1MFI

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) 1 under the LH fascia.

Erasing – except Ascender/i-series

  • After the faults have been rectified, trouble codes can be erased by using a Scan Tool connected to the data link connector (DLC) 1 or as follows:
  • Ensure ignition switched OFF.
  • Disconnect battery ground cable for 30 seconds minimum.
  • Reconnect battery ground cable.
  • Repeat checking procedure to ensure no data remains in ECM fault memory.

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

Erasing – Ascender/i-series

  • After the faults have been rectified, trouble codes can only be erased by using a Scan Tool connected to the data link connector (DLC) 1

Trouble code  identification

OBD-11 codeFault locationProbable cause
PO, P2, UORefer to OBD-11 trouble code tables–
P1101Mass air flow (MAF) and manifold absolute pressure (MAP) sensors – circuit malfunctionWiring, MAF, MAP, ECM
P1106Manifold absolute pressure (MAP) sensor – circuiUintermittent voltage highWiring, MAP sensor, mechanical fault, ECM
P1107Manifold absolute pressure (MAP) sensor – circuiUintermittent voltage lowWiring, MAP sensor, mechanical fault, ECM
P1111Intake air temperature (IAT) sensor – circuit/   intermittent voltage highWiring, IAT sensor, ECM
P1112Intake air temperature (IAT) sensor – circuiU   intermittent voltage lowWiring, IAT sensor, ECM
P1114Engine coolant temperature (ECT) sensor- circuiUintermittent voltage lowWiring, ECT sensor, ECM
P1115Engine coolant temperature (ECT) sensor- circuit/intermittent voltage highWiring, ECT sensor, ECM
P1120Throttle motor position sensor 1 – circuit malfunctionWiring open circuit/short circuit to ground/ short circuit to positive, throttle control unit, ECM
P1121Throttle position (TP) sensor – circuit/   intermittent voltage highWiring, TP sensor, mechanical fault, ECM
P1122Throttle position (TP) sensor – circuit/   intermittent voltage lowWiring, TP sensor, mechanical fault, ECM
P1125 0Throttle position (TP) motor – fail safe modeWiring, TP sensor, TP motor, mechanical fault, ECM
P1125 t)Accelerator pedal position (APP) sensor   1/2/3 – signal malfunctionWiring, APP sensor, ECM
P1133 0Heated oxygen sensor (H02S) – RH front   (6 cyl) – insufficient switchingWiring, H02S, fuel system, fuel pressure, mechanical fault, ECM
P1133 0Oxygen sensor (02S)- front (4 cyl)- insufficient switchingWiring, 025, fuel system, fuel pressure, mechanical fault, ECM
P1133 t)Oxygen sensor (02S)/heated oxygen sensor   (H02S) 1, bank 1 – insufficient switchingWiring, exhaust system leaking, 02S/H025
P1134 0Heated oxygen sensor (H02S) – RH front – slow operationWiring, H02S, fuel system, fuel pressure, mechanical fault, ECM
P1134 HHeated oxygen sensor (H02S) 1, bank 1 – slow responseWiring, oxygen sensor heater, exhaust system leaking, H02S
P1137Heated oxygen sensor (H02S) 1/2- voltage incorrectWiring, exhaust system leaking, H02S
P1138Heated oxygen sensor (H02S) 2 – voltage highWiring, H02S
P1153 0Heated oxygen sensor (H02S)- LH front – insufficient switchingWiring, H02S, fuel system, fuel pressure, mechanical fault, ECM
P1153 HHeated oxygen sensor (H02S) 1, bank 2 – insufficient switchingWiring, oxygen sensor heater, exhaust system leaking, H02S
P1154 0Heated oxygen sensor (H02S)- LH front – slow operationWiring, H02S, fuel system, fuel pressure, mechanical fault, ECM
P1154 HHeated oxygen sensor (H02S) 1, bank 2 – slow responseWiring, oxygen sensor heater, exhaust system leaking, H02S
P1167Fuel trim, bank 1 – mixture too rich during decelerationInjectors, fuel pump, fuel pressure, ECM
P1169Fuel trim, bank 2 – mixture too rich during decelerationInjectors, fuel pump, fuel pressure, ECM
P1171Fuel trim – mixture too lean during accelerationWiring, H02/H02S, mechanical fault, fuel system, fuel pressure, ECM
P1220   .Throttle motor position sensor 2 – circuit malfunctionWiring open circuit/short circuit to ground/ short circuit to positive, throttle control unit, ECM
P1221Throttle motor position sensor 1/2 – signal variationWiring, throttle control unit, ECM
P1258Engine coolant – excessive temperatureWiring, engine coolant blower motor, mechanical fault, ECM
P1271Accelerator pedal position (APP) sensor 1/2- signal variationWiring, APP sensor, ECM
P1272Accelerator pedal position (APP) sensor 2/3 – signal variationWiring, APP sensor, ECM
P1273Accelerator pedal position (APP) sensor 1/3- signal variationWiring, APP sensor, ECM
P1275Accelerator pedal position (APP) sensor 1 – circuit malfunctionWiring open circuit/short circuit to ground/   short circuit to positive, APP sensor, ECM
P1280Accelerator pedal position (APP) sensor 2 – circuit malfunctionWiring open circuit/short circuit to ground/   short circuit to positive, APP sensor, ECM
P1285Accelerator pedal position (APP) sensor 3 – circuit malfunctionWiring, APP sensor, ECM
P1290Throttle position (TP) motor -forced idle modeWiring, APP sensor, TP motor, mechanical fault, ECM
P1295Throttle position (TP) motor – power management modeWiring, TP sensor, TP motor, MAP sensor, MAF sensor, ECM
P1299Throttle position (TP) motor – forced engine shut down modeWiring, TP sensor, TP motor, MAP sensor, MAF sensor, ECM
P1310Ignition control module (ICM) – diagnosisWiring, ignition coil(s), ICM, ECM
P1311Ignition control module (ICM) – ignition coil secondary coil signal, circuit 1Wiring, ignition coil(s), ICM, ECM
P1312Ignition control module (ICM) – ignition coil secondary coil signal, circuit 2Wiring, ignition coil(s), ICM, ECM
P1326Ignition control module (ICM) – combustion quality input signalWiring, ignition coil(s), ICM, ECM
P1336Crankshaft position (CKP) sensor – signal variationWiring, CKP sensor, mechanical fault, learning procedure not performed, ECM
P1340Ignition control module (ICM) – cylinder identification/syncronizationWiring, ignition coil(s), ICM, ECM
P1345CKP/CMP signals – signal malfunctionWiring, CKP/CMP sensor, mechanical fault
P1351Ignition control module (ICM) – signal voltage highWiring, ICM, ignition system, mechanical fault, ECM
P1361Ignition control module (ICM) – signal not switchingWiring, ICM, ignition system, mechanical fault, ECM
P1380ECM to ABS communication – unusable signalWiring, mechanical fault
P1381ECM to ABS communication – misfire detectedWiring, mechanical fault
P1390G-force sensor – intermittent voltage lowWiring, G-force sensor, mechanical fault, ECM
P1391G-force sensor – performanceWiring, G-force sensor, mechanical fault, ECM
P1392G-force.sensor – voltage lowWiring, G-force sensor, mechanical fault, ECM
P1393G-force sensor – voltage highWiring, G-force sensor, mechanical fault, ECM
P1394G-force sensor – intermittent voltage highWiring, G-force sensor, mechanical fault, ECM
P1400Cold start emission control – malfunctionIntake/exhaust leak/blockage, mechanical fault, idle speed control (ISC) system, ignition control, engine coolant temperature (ECT) sensor, H02S
P1404Exhaust gas recirculation (EGR) solenoid – valve closedWiring, EGR valve/solenoid/position sensor, mechanical fault, ECM
P1404Exhaust gas recirculation (EGR) valve – stuck openWiring open circuit/short circuit to positive, exhaust gas recirculation (EGR) valve position sensor, EGR solenoid
P1406Exhaust gas recirculation (EGR) system – circuit problemWiring, EGR valve/solenoid/position sensor, mechanical fault, ECM
P1415Secondary air injection (AIR) system, bank 1Wiring, hoses blocked/leaking, AIR valve
P1416Secondary air injection (AIR) system, bank 2Wiring, hoses blocked/leaking, AIR valve
P1441Evaporative emission (EVAP) canister purge system – leak detectedWiring, EVAP valve/solenoid, hoses, mechanical fault
P1442Evaporative emission (EVAP) canister purge switch – voltage highWiring, EVAP valve/solenoid, hoses, mechanical fault
P1481Engine coolant blower motor speed – malfunctionWiring, engine coolant blower motor, ECM
P1482Engine coolant blower motor clutch – incorrect voltageWiring, engine coolant blower motor relay, engine coolant blower motor, ECM
P1484Engine coolant blower motor relay – speed signal variationWiring, engine coolant blower motor relay, engine coolant blower motor, ECM
P1508Idle air control (lAC) system – low RPMWiring, lAC valve, mechanical fault, ECM
P1509Idle air control (lAC) system – high RPMWiring, lAC valve, mechanical fault, ECM
P1512Throttle control unit – signal variationWiring, throttle control unit, ECM
P1514Throttle position (TP) sensor/mass air flow   (MAF) sensor – signal variationWiring, TP sensor, MAP sensor, ECM
P1515Throttle command/actual throttle position – signal vpriationWiring, throttle valve sticking, throttle control unit, ECM
P1516Throttle position motor – position performanceThrottle valve tight/sticking, TP sensor, wiring, throttle control unit, ECM
P1518Throttle control module/engine control module   (ECM) – communication malfunctionWiring, throttle control module, ECM
P1520Park/neutral position (PNP) switch – circuit malfunctionWiring, PNP switch, mechanical fault
P1523Throttle position motor – closed position performanceThrottle valve tight/sticking, TP sensor, wiring open circuit/short circuit to ground, throttle control unit, ECM
P1545AIC compressor clutch relay – circuit malf!JnctionWiring open circuit/short circuit to ground/ short circuit to positive, AJC compressor clutch relay, ECM
P1546AIC compressor clutch relay – circuit malfunctionWiring open circuit/short circuit to ground/ short circuit to positive, AJC compressor clutch relay, ECM
P1571 0Brake pedal position (BPP) switch – no operationWiring, BPP switch
P1571 fJTraction control system (TCS), torque request signal – malfunctionWiring, poor connections, ABS/TCS
P1574Brake pedal position (BPP) switch – circuit malfunctionWiring, BPP switch
P1600 0Serial communication – malfunctionECM
P1600 fJEngine control module (ECM) – malfunctionECM
P1601Serial communication – malfunctionECM
P1602ECM to ABS communication – circuit malfunctionECM
P1618Engine control module (ECM) – internal faultECM
P1621Engine control module (ECM) – internal memory performanceECM
P1625Engine control module (ECM) – unexpected resetInterference from non standard electronics, erase trouble code and re-test
P1626Immobilizer system – ECM to multifunction control module communicationmalfunctionWiring, ECM, multifunction control module
P1627 0Engine control module (ECM) – analogue/   digital converterSensor supply wiring open/short circuit, ECM
P1627 f)Engine control module (ECM) – malfunctionECM
P1630Engine control module (ECM), immobilizer code – learning modeECM immobilizer code programming not completed
P1631Immobilizer system – password/code incorrectImmobilizer module, incorrect key, mechanical fault, ECM
P1632Immobilizer system – fueling disabled!mobilizer module, incorrect key, mechanical fault, ECM
P1633Engine control module (ECM), ignition supply voltageFuse, wiring open circuit, ECM
P1635 0Sensor supply voltage – circuit A malfunctionWiring short circuit to ground/positive, ground wiring open circuit, ECM
P1635 f)Engine control module (ECM), sensor supply voltage – circuit malfunctionWiring, poor connections, TP sensor 1, accelerator pedal position (APP) sensor 2, A/C refrigerant pressure sensor, FTP sensor, engine coolant blower motor speed sensor, engine oil pressure sensor, ECM
P1636Engine control module (ECM) – RAM stackInterference from non standard electronics, erase trouble code and re-test
P1637Alternator ‘L’ terminal – circuit malfunctionWiring open circuit/short circuit to ground, alternator, battery temperature sensor, ECM
P1639 0Sensor supply voltage – circuit B malfunctionWiring short circuit to ground/positive, ground wiring open circuit, throttle position (TP) sensor, ECM
P1639 f)Engine control module (ECM), sensor supply voltage – circuit malfunctionWiring, poor connections, MAP sensor sensor, throttle position (TP) sensor 2, accelerator pedal position (APP) sensor 1, ECM
P1638Alternator field circuit – signal out of rangeWiring, alternator, ECM
P1640Engine control module (ECM), output driver 1 – supply voltage highWiring, instruments, EVAP canister purge valve, A/C compressor relay
P1646Sensor supply voltage – circuit C malfunctionWiring short circuit to ground/positive, ground wiring open circuit, accelerator pedal position (APP) sensor, ECM
P1650Engine control module quad driver/output driverWiring, evaporative emission (EVAP) canister purge valve, intake manifold air control solenoid, ECM
P1680Engine control module (ECM) – malfunctionECM
P1681Engine control module (ECM) – malfunctionECM
P1683Engine control module (ECM) – malfunctionECM
P1682Throttle control module/engine control module   (ECM) – ignition power supply variationWiring, ECM
P1689Traction control system (TCS), delivered torque signal – malfunctionWiring, poor connections, ECM
P1790Engine control module (ECM) – AT ROM   checksum errorECM
P1792AT – AT EEPROM checksum errorECM
P1810AT – manual valve position pressure switch malfunctionWiring, manual valve position pressure switch
P1815Transmission fluid pressure (TFP) switch – invalid gear selectionWiring, selector lever linkage incorrectly adjusted, TFP switch, ECM/TCM
P1816Transmission fluid pressure (TFP) switch – invalid gear selectionWiring, selector lever linkage incorrectly adjusted, TFP switch, ECM/TCM
P1818Transmission fluid pressure (TFP) switch – invalid gear selectionWiring, selector lever linkage incorrectly adjusted, TFP switch, ECM/TCM
P1835AT- kick-down switchWiring, kick-down switch, mechanical fault
P1860AT- torque converter clutch (TCC) solenoid circuitWiring, TCC solenoid
P1870AT – component slippingMechanical fault
P1875AT – component slippingMechanical fault
U1000Class 2 communication ID not learnedECM
U10264WD AT control module communication – no signalWiring, 4WD AT control module, ECM
U1040Controller area network (CAN) data bus – communication malfunctionWiring, instrument panel, ECM
U1041ECM to ASS communication – no signalWiring, ABS control module, ECM
U1064ECM to multifunction control module communication – no signalWiring, multifunction control module, ECM
U1096ECM to multifunction control module communication – no signalWiring, multifunction control module, ECM
U1152Class 2 communication ID missingWiring, missing control module
U1300Class 2 communication – low voltageWiring, ECM
U1301Class 2 communication – high voltageWiring, ECM