OBDII Isuzu Code Definitions.
Be sure to double check the codes. Anything P1000 to P1999 or P3000 to P3400 will be Manufacturer specific and may not match the ones listed here. Check specific manufacturer pages on the site, as some of them, we list the OBD2 codes on those pages for those specific vehicles.
[ Acura ] [ Audi ] [ BMW ] [ Buick ] [ Cadillac ] [ Chevrolet ] [ Chrysler ] [ Dodge ] [ Eagle ] [ Ford ] [ Freightliner ] [ GM ] [ Honda ] [ Hummer ] [ Hyundai ] [ Infiniti ] [ Isuzu ] [ Jaguar ] [ Jeep ] [ Kia ] [ Land Rover ] [ Lexus ] [ Lincoln ] [ Mazda ] [ Mercedes-Benz ] [ Mercury ] [ Mini ] [ Mitsubishi ] [ Nissan ] [ Oldsmobile ] [ Plymouth ] [ Pontiac ] [ Saab ] [ Saturn ] [ Scion ] [ Subaru ] [ Suzuki ] [ Toyota ] [ Volvo ] [ VW ]
| Isuzu Codes | ||
|---|---|---|
| Trouble Code | Fault Location | Probable Cause |
| P1085 | High Pressure Fuel Pump Performance | |
| P1093 | Fuel Rail Pressure Too Low | |
| P1101 | Mass air flow (MAF) and manifold absolute pressure (MAP) sensors – circuit malfunction | Wiring, MAF, MAP, ECM |
| P1106 | Manifold absolute pressure (MAP) sensor – circuiUintermittent voltage high | Wiring, MAP sensor, mechanical fault, ECM |
| P1107 | Manifold absolute pressure (MAP) sensor – circuiUintermittent voltage low | Wiring, MAP sensor, mechanical fault, ECM |
| P1108 | Barometric pressure (BARO) sensor - circuit/voltage high | ECM |
| P1111 | Intake air temperature (IAT) sensor – circuit/ intermittent voltage high | Wiring, IAT sensor, ECM |
| P1112 | Intake air temperature (IAT) sensor – circuiU intermittent voltage low | Wiring, IAT sensor, ECM |
| P1114 | Engine coolant temperature (ECT) sensor- circuiUintermittent voltage low | Wiring, ECT sensor, ECM |
| P1115 | Engine coolant temperature (ECT) sensor- circuit/intermittent voltage high | Wiring, ECT sensor, ECM |
| P1120 | Throttle motor position sensor 1 – circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, throttle control unit, ECM |
| P1121 | Throttle position (TP) sensor – circuit/ intermittent voltage high | Wiring, TP sensor, mechanical fault, ECM |
| P1122 | Throttle position (TP) sensor – circuit/ intermittent voltage low | Wiring, TP sensor, mechanical fault, ECM |
| P1125 | Throttle position (TP) motor - fail safe mode | Wiring, TP sensor, TP motor, mechanical fault, ECM |
| P1128 | Manifold absolute pressure (MAP) sensor - pressure lower than expected | MAP sensor |
| P1129 | Manifold absolute pressure (MAP) sensor - pressure higher than expected | MAP sensor |
| P1133 | Heated oxygen sensor (HO2S) - RH front (6 cyl) - insufficient switching | Wiring, HO2S, fuel system, fuel pressure, mechanical fault, ECM |
| P1134 | Heated oxygen sensor (HO2S) - RH front - slow operation | Wiring, HO2S, fuel system, fuel pressure, mechanical fault, ECM |
| P1137 | Heated oxygen sensor (H02S) 1/2- voltage incorrect | Wiring, exhaust system leaking, H02S |
| P1138 | Heated oxygen sensor (H02S) 2 – voltage high | Wiring, H02S |
| P1153 | Heated oxygen sensor (HO2S) - LH front - insufficient switching | Wiring, HO2S, fuel system, fuel pressure, mechanical fault, ECM |
| P1154 | Heated oxygen sensor (HO2S) - LH front - slow operation | Wiring, HO2S, fuel system, fuel pressure, mechanical fault, ECM |
| P1167 | Fuel trim, bank 1 – mixture too rich during deceleration | Injectors, fuel pump, fuel pressure, ECM |
| P1169 | Fuel trim, bank 2 – mixture too rich during deceleration | Injectors, fuel pump, fuel pressure, ECM |
| P1171 | Fuel trim – mixture too lean during acceleration | Wiring, H02/H02S, mechanical fault, fuel system, fuel pressure, ECM |
| P1174 | Fuel Trim Cylinder Balance | |
| P1201 | Injector Circuit Open / Shorted Cylinder #1 | |
| P1202 | Injector Circuit Open / Shorted Cylinder #2 | |
| P1203 | Injector Circuit Open / Shorted Cylinder #3 | |
| P1204 | Injector Circuit Open / Shorted Cylinder #4 | |
| P1205 | Injector Circuit Open / Shorted Cylinder #5 | |
| P1206 | Injector Circuit Open / Shorted Cylinder #6 | |
| P1220 | Throttle motor position sensor 2 - circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, throttle control unit, ECM |
| P1220 . | Throttle motor position sensor 2 – circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, throttle control unit, ECM |
| P1221 | Throttle motor position sensor 1/2 – signal variation | Wiring, throttle control unit, ECM |
| P1237 | High Fuel Pressure Regulator Circuit Shorted To Ground | |
| P1238 | High Fuel Pressure Regulator Circuit Shorted To Battery | |
| P1239 | High Fuel Pressure System Fault | |
| P1240 | High Fuel Pressure Regulator Circuit Open | |
| P1241 | High Fuel Pressure Regulator Circuit Low Voltage | |
| P1242 | High Fuel Pressure Regulator Circuit High Voltage | |
| P1246 | Low Fuel Pressure Regulator Circuit Malfunction | |
| P1247 | Low Fuel Pressure Regulator Circuit Low Voltage | |
| P1248 | Fuel Pump Relay Control Circuit Open | |
| P1249 | Low Fuel Pressure Sensor Circuit High Voltage | |
| P1250 | Fuel Pump Relay Control Circuit Shorted To Ground | |
| P1253 | VTEC system - malfunction | Wiring, VTEC solenoid, ECM |
| P1258 | Engine coolant – excessive temperature | Wiring, engine coolant blower motor, mechanical fault, ECM |
| P1259 | VTEC system - malfunction | Wiring, VTEC solenoid/pressure switch, ECM |
| P1271 | Accelerator pedal position (APP) sensor 1/2- signal variation | Wiring, APP sensor, ECM |
| P1272 | Accelerator pedal position (APP) sensor 2/3 – signal variation | Wiring, APP sensor, ECM |
| P1273 | Accelerator pedal position (APP) sensor 1/3- signal variation | Wiring, APP sensor, ECM |
| P1275 | Accelerator pedal position (APP) sensor 1 – circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, APP sensor, ECM |
| P1280 | Accelerator pedal position (APP) sensor 2 – circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, APP sensor, ECM |
| P1285 | Accelerator pedal position (APP) sensor 3 – circuit malfunction | Wiring, APP sensor, ECM |
| P1290 | Throttle position (TP) motor -forced idle mode | Wiring, APP sensor, TP motor, mechanical fault, ECM |
| P1293 | High Side Open Bank No. 1 | |
| P1295 | Throttle position (TP) motor – power management mode | Wiring, TP sensor, TP motor, MAP sensor, MAF sensor, ECM |
| P1297 | Electrical load sensor - circuit/voltage low | Wiring, electrical load sensor, ECM |
| P1298 | Electrical load sensor - circuit/voltage high | Wiring, electrical load sensor, ECM |
| P1299 | Throttle position (TP) motor – forced engine shut down mode | Wiring, TP sensor, TP motor, MAP sensor, MAF sensor, ECM | P1300 – P1399 (Ignition system or misfire) |
| P1300 | Random misfire | Ignition/fuel/EGR system, MAP sensor, IAC valve |
| P1310 | Ignition control module (ICM) – diagnosis | Wiring, ignition coil(s), ICM, ECM |
| P1311 | Ignition control module (ICM) – ignition coil secondary coil signal, circuit 1 | Wiring, ignition coil(s), ICM, ECM |
| P1312 | Ignition control module (ICM) – ignition coil secondary coil signal, circuit 2 | Wiring, ignition coil(s), ICM, ECM |
| P1326 | Ignition control module (ICM) – combustion quality input signal | Wiring, ignition coil(s), ICM, ECM |
| P1336 | Crankshaft position (CKP) sensor – signal variation | Wiring, CKP sensor, mechanical fault, learning procedure not performed, ECM |
| P1340 | Ignition control module (ICM) – cylinder identification/syncronization | Wiring, ignition coil(s), ICM, ECM |
| P1345 | CKP/CMP signals – signal malfunction | Wiring, CKP/CMP sensor, mechanical fault |
| P1348 | Variable Valve Timing System Fault Bank 1 | |
| P1350 | Variable Valve Timing System Fault Bank 2 | |
| P1351 | Ignition control module (ICM) – signal voltage high | Wiring, ICM, ignition system, mechanical fault, ECM |
| P1359 | Crankshaft position (CKP) sensor - connector disconnection | Wiring |
| P1361 | Ignition control module (ICM) – signal not switching | Wiring, ICM, ignition system, mechanical fault, ECM |
| P1362 | Crankshaft position (CKP) sensor - no signal | Wiring, CKP sensor, ECM |
| P1380 | ECM to ABS communication – unusable signal | Wiring, mechanical fault |
| P1381 | ECM to ABS communication – misfire detected | Wiring, mechanical fault |
| P1382 | Camshaft position (CMP) sensor - no signal | Wiring, CMP sensor, ECM |
| P1390 | G-force sensor – intermittent voltage low | Wiring, G-force sensor, mechanical fault, ECM |
| P1391 | G-force sensor – performance | Wiring, G-force sensor, mechanical fault, ECM |
| P1392 | G-force.sensor – voltage low | Wiring, G-force sensor, mechanical fault, ECM |
| P1393 | G-force sensor – voltage high | Wiring, G-force sensor, mechanical fault, ECM |
| P1394 | G-force sensor – intermittent voltage high | Wiring, G-force sensor, mechanical fault, ECM | P1400 – P1499 (Emission control) |
| P1400 | Cold start emission control – malfunction | Intake/exhaust leak/blockage, mechanical fault, idle speed control (ISC) system, ignition control, engine coolant temperature (ECT) sensor, H02S |
| P1404 | Exhaust gas recirculation (EGR) valve – stuck open | Wiring open circuit/short circuit to positive, exhaust gas recirculation (EGR) valve position sensor, EGR solenoid |
| P1406 | Exhaust gas recirculation (EGR) system – circuit problem | Wiring, EGR valve/solenoid/position sensor, mechanical fault, ECM |
| P1415 | Secondary air injection (AIR) system, bank 1 | Wiring, hoses blocked/leaking, AIR valve |
| P1416 | Secondary air injection (AIR) system, bank 2 | Wiring, hoses blocked/leaking, AIR valve |
| P1441 | Evaporative emission (EVAP) canister purge system – leak detected | Wiring, EVAP valve/solenoid, hoses, mechanical fault |
| P1442 | Evaporative emission (EVAP) canister purge switch – voltage high | Wiring, EVAP valve/solenoid, hoses, mechanical fault |
| P1456 | Evaporative emission (EVAP) canister purge system (fuel tank system) - leak detected | Hose, fuel tank/pressure sensor, fuel filler cap, EVAP valve/ bypass solenoid, EVAP two way valve, EVAP canister/vent valve |
| P1457 | Evaporative emission (EVAP) canister purge system (canister system) - leak detected | Hose, fuel tank/pressure sensor, EVAP valve/bypass solenoid, EVAP two way valve, EVAP canister/vent valve |
| P1459 | Evaporative emission (EVAP) canister purge system - switch malfunction | Wiring, EVAP flow switch, hose leak/blockage, ECM |
| P1471 | Diesel Particulate Filter Regeneration Insufficient | |
| P1481 | Engine coolant blower motor speed – malfunction | Wiring, engine coolant blower motor, ECM |
| P1482 | Engine coolant blower motor clutch – incorrect voltage | Wiring, engine coolant blower motor relay, engine coolant blower motor, ECM |
| P1484 | Engine coolant blower motor relay – speed signal variation | Wiring, engine coolant blower motor relay, engine coolant blower motor, ECM |
| P1491 | Exhaust gas recirculation (EGR) system - valve lift insufficient | Wiring, EGR valve/position sensor, EGR solenoid, hose leak/blockage, ECM |
| P1498 | Exhaust gas recirculation (EGR) valve position sensor - voltage high | Wiring, EGR valve/position sensor, ECM |
| P1508 | Idle air control (lAC) system – low RPM | Wiring, lAC valve, mechanical fault, ECM |
| P1509 | Idle air control (lAC) system – high RPM | Wiring, lAC valve, mechanical fault, ECM |
| P1512 | Throttle control unit – signal variation | Wiring, throttle control unit, ECM |
| P1514 | Throttle position (TP) sensor/mass air flow (MAF) sensor – signal variation | Wiring, TP sensor, MAP sensor, ECM |
| P1515 | Throttle command/actual throttle position – signal vpriation | Wiring, throttle valve sticking, throttle control unit, ECM |
| P1516 | Throttle position motor – position performance | Throttle valve tight/sticking, TP sensor, wiring, throttle control unit, ECM |
| P1517 | Commanded Versus Actual Throttle Position Correlation | |
| P1518 | Throttle control module/engine control module (ECM) – communication malfunction | Wiring, throttle control module, ECM |
| P1519 | Idle air control (IAC) valve - circuit failure | Wiring, IAC valve, ECM |
| P1520 | Park/neutral position (PNP) switch – circuit malfunction | Wiring, PNP switch, mechanical fault |
| P1521 | Commanded Versus Actual Throttle Position Correlation Small Stop Close | |
| P1523 | Throttle position motor – closed position performance | Throttle valve tight/sticking, TP sensor, wiring open circuit/short circuit to ground, throttle control unit, ECM |
| P1545 | AIC compressor clutch relay – circuit malf!Jnction | Wiring open circuit/short circuit to ground/ short circuit to positive, AJC compressor clutch relay, ECM |
| P1546 | AIC compressor clutch relay – circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, AJC compressor clutch relay, ECM |
| P1548 | A/C Compressor Clutch Output Circuit Malfunction | |
| P1571 | Brake pedal position (BPP) switch - no operation | Wiring, BPP switch |
| P1574 | Brake pedal position (BPP) switch – circuit malfunction | Wiring, BPP switch | P1600 – P1699 (ECM – computer output circuit) |
| P1600 | Serial communication - malfunction | ECM |
| P1601 | Serial communication – malfunction | ECM |
| P1602 | ECM to ABS communication – circuit malfunction | ECM |
| P1607 | Engine control module (ECM) - internal circuit failure | ECM |
| P1618 | Engine control module (ECM) – internal fault | ECM |
| P1621 | Engine control module (ECM) – internal memory performance | ECM |
| P1625 | Engine control module (ECM) – unexpected reset | Interference from non standard electronics, erase trouble code and re-test |
| P1626 | Immobilizer system – ECM to multifunction control module communicationmalfunction | Wiring, ECM, multifunction control module |
| P1627 | Engine control module (ECM) - analogue/ digital converter | Sensor supply wiring open/short circuit, ECM |
| P1630 | Engine control module (ECM), immobilizer code – learning mode | ECM immobilizer code programming not completed |
| P1631 | Immobilizer system – password/code incorrect | Immobilizer module, incorrect key, mechanical fault, ECM |
| P1632 | Immobilizer system – fueling disabled | !mobilizer module, incorrect key, mechanical fault, ECM |
| P1633 | Engine control module (ECM), ignition supply voltage | Fuse, wiring open circuit, ECM |
| P1635 | Sensor supply voltage - circuit A malfunction | Wiring short circuit to ground/positive, ground wiring open circuit, ECM |
| P1636 | Engine control module (ECM) – RAM stack | Interference from non standard electronics, erase trouble code and re-test |
| P1637 | Alternator ‘L’ terminal – circuit malfunction | Wiring open circuit/short circuit to ground, alternator, battery temperature sensor, ECM |
| P1638 | Alternator field circuit – signal out of range | Wiring, alternator, ECM |
| P1639 | Sensor supply voltage - circuit B malfunction | Wiring short circuit to ground/positive, ground wiring open circuit, throttle position (TP) sensor, ECM |
| P1640 | Engine control module (ECM), output driver 1 – supply voltage high | Wiring, instruments, EVAP canister purge valve, A/C compressor relay |
| P1646 | Sensor supply voltage – circuit C malfunction | Wiring short circuit to ground/positive, ground wiring open circuit, accelerator pedal position (APP) sensor, ECM |
| P1650 | Engine control module quad driver/output driver | Wiring, evaporative emission (EVAP) canister purge valve, intake manifold air control solenoid, ECM |
| P1660 | AT to ECM - data line failure | Wiring, TCM, ECM |
| P1680 | Engine control module (ECM) – malfunction | ECM |
| P1681 | Engine control module (ECM) – malfunction | ECM |
| P1682 | Throttle control module/engine control module (ECM) – ignition power supply variation | Wiring, ECM |
| P1683 | Engine control module (ECM) – malfunction | ECM |
| P1686 | AT to ECM - signal B - voltage low | Wiring, TCM, ECM |
| P1687 | AT to ECM - signal B - voltage high | Wiring, TCM, ECM |
| P1689 | Traction control system (TCS), delivered torque signal – malfunction | Wiring, poor connections, ECM |
| P1705 | AT - gear shift malfunction | Wiring, range position switch, ECM |
| P1706 | AT - gear shift malfunction | Wiring, range position switch, ECM |
| P1738 | Automatic transmission | Wiring, clutch pressure switch 2, ECM |
| P1739 | Automatic transmission | Wiring, clutch pressure switch 3, ECM |
| P1753 | AT - lock-up clutch not engaging/ disengaging | Wiring, lock-up control solenoid A, ECM |
| P1758 | AT - lock-up clutch not engaging | Wiring, lock-up control solenoid B, ECM |
| P1768 | AT - lock-up clutch not engaging | Wiring, linear solenoid, TCM |
| P1773 | AT - lock-up clutch not engaging | Wiring, clutch pressure control solenoid B, ECM |
| P1786 | AT - poor gear shift | Communication wire, ECM |
| P1788 | Automatic Transmission Poor Gear Shift | |
| P1790 | Engine control module (ECM) – AT ROM checksum error | ECM |
| P1791 | AT - lock-up clutch not engaging | Wiring, VSS, TCM |
| P1792 | AT – AT EEPROM checksum error | ECM |
| P1794 | Automatic transmission - BARO signal | Wiring, ECM, TCM |
| P1810 | AT – manual valve position pressure switch malfunction | Wiring, manual valve position pressure switch |
| P1815 | Transmission fluid pressure (TFP) switch – invalid gear selection | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECM/TCM |
| P1816 | Transmission fluid pressure (TFP) switch – invalid gear selection | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECM/TCM |
| P1818 | Transmission fluid pressure (TFP) switch – invalid gear selection | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECM/TCM |
| P1835 | AT- kick-down switch | Wiring, kick-down switch, mechanical fault |
| P1860 | AT- torque converter clutch (TCC) solenoid circuit | Wiring, TCC solenoid |
| P1870 | AT – component slipping | Mechanical fault |
| P1875 | AT – component slipping | Mechanical fault |
| U1000 | Class 2 communication ID not learned | ECM |
| U1026 | 4WD AT control module communication – no signal | Wiring, 4WD AT control module, ECM |
| U1040 | Controller area network (CAN) data bus – communication malfunction | Wiring, instrument panel, ECM |
| U1041 | ECM to ASS communication – no signal | Wiring, ABS control module, ECM |
| U1064 | ECM to multifunction control module communication – no signal | Wiring, multifunction control module, ECM |
| U1096 | ECM to multifunction control module communication – no signal | Wiring, multifunction control module, ECM |
| U1152 | Class 2 communication ID missing | Wiring, missing control module |
| U1300 | Class 2 communication – low voltage | Wiring, ECM |
| U1301 | Class 2 communication – high voltage | Wiring, ECM |