Lexus OBD/OBD2 Codes >> GX470 – LX470 – RX300 – RX330 (1998 – 2009)

ModeLYearEngine identificationSystem
GX470 4.7L2003-092UZ-FESFI
LX47 04.7L1998-072UZ-FESFI
RX300 3.0L1999-031MZ-FESFI
RX330 3.3L2004-063MZ-FESFI

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.


  • Trouble codes can be displayed by using a Scan Tool connected to the data link connector (DLC) 1.


  • After the faults have been rectified, 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 lead for 60 seconds minimum.
  • Reconnect battery ground lead.

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

Trouble code  identification

OBD·II codeFault locationProbable cause
PO, P2, UORefer to OBD-11 trouble code tables
P1100Barometric pressure (BARO) sensor – circuit malfunctionECM
P1120Accelerator pedal position (APP) sensor – circuit malfunctionWiring, APP sensor, ECM
P1121Accelerator pedal position (APP) sensor – range/performance problemAPP sensor, ECM
P1125Throttle actuator control (TAC) motor – circuit malfunctionWiring, TAC motor, ECM
P1126Throttle actuator control (TAC) clutch – circuit malfunctionWiring, magnetic clutch, ECM
P1127Throttle actuator control (TAC) power source- circuit malfunctionWiring, ECM
P1128Throttle actuator control (TAC) lock- malfunctionTAC motor, throttle body, ECM
P1129Throttle actuator control (TAC) system- malfunctionTAC system, ECM
P1130Heated oxygen sensor (H02S) – LH front – range/performance problemWiring, H02S, ECM
P1133Heated oxygen sensor (H02S) – LH front- response malfunctionH02S
P1135Heated oxygen sensor (H02S)- LH front- heater circuit malfunctionWiring, H02S, ECM
P1150Heated oxygen sensor (H02S) – RH front – range/performance problemWiring, H02S, ECM
P1153Heated oxygen sensor (H02S) – RH front – response malfunctionH02S
P1155Heated oxygen sensor (H02S) – RH front – heater circuit malfunctionWiring, H02S, ECM
P1200Fuel pump (FP) relay/engine control module   (ECM) – circuit malfunctionWiring, fuel pump relay, ECM
P1300Ignition control – cylinder No.1 – circuit malfunctionWiring, ignition coil/module, ECM
P1305Ignition control – cylinder No.2 – circuit malfunctionWiring, ignition coil/module, ECM
P1310Ignition control – cylinder No.3 – circuit malfunctionWiring, ignition coil/module, ECM
P1315Ignition control – cylinder No.4 – circuit malfunctionWiring, ignition coil/module, ECM
P1320Ignition control – cylinder No.5 – circuit malfunctionWiring, ignition coil/module, ECM
P1325Ignition control – cylinder No.6 – circuit malfunctionWiring, ignition coil/module, ECM
P1330Ignition control – cylinder No.7 – circuit malfunctionWiring, ignition coil/module, ECM
P1335Crankshaft position (CKP) sensor – no signalWiring, CKP sensor, starter motor, ECM
P1340 0Ignition control – cylinder No.8 – circuit malfunctionWiring, ignition coil/module, ECM
P1340 fJCamshaft position (CMP) sensor 2, bank 1 – circuit malfunctionWiring, CMP, mechanical fault, ECM
P1341Camshaft position (CMP) sensor 2, bank 1 – circuit malfunctionWiring, CMP, mechanical fault, ECM
P1345Variable valve timing sensor – LH bank – circuit malfunctionWiring, valve timing sensor, ECM
P1346Variable valve timing sensor – LH bank – range/performance problemValve timing, ECM
P1349Variable valve timing system – LH bank – malfunctionValve timing, oil control valve, valve timing control module, ECM
P1350Variable valve timing sensor – RH bank – circuit malfunctionWiring, valve timing sensor, ECM
P1351Variable valve timing sensor – RH bank – range/performance problemValve timing, ECM
P1354Variable valve “timing system – RH bank – malfunctionValve timing, oil control valve, valve timing control module, ECM
P1400Throttle position (TP) sensor 2 – circuit malfunctionWiring, TP sensor, ECM
P1401Throttle position (TP) sensor 2 – range/performance problemTP sensor
P1410Exhaust gas recirculation (EGR) valve position sensor – malfunctionWiring, EGR valve position sensor, ECM
P1411Exhaust gas recirculation (EGR) valve position sensor – range/performance problemEGR valve position sensor
P1440Secondary air injection (AIR) switching valve, bank 1 – circuit malfunctionWiring, AIR valve, ECM
P1441Secondary air injection (AIR) switching valve, valve stuck open, bank 1 – circuit malfunctionWiring, AIR valve, ECM
P1442Secondary air injection (AIR) switching valve, valve stuck closed, bank 1 – circuit malfunctionWiring, AIR valve, vacuum hose, ECM
P1443Secondary air injection (AIR) switching valve, bank 2 – circuit malfunctionWiring, AIR valve, ECM
P1444Secondary air injection (AIR) switching valve, valve stuck open, bank 2 – circuit malfunctionWiring, AIR valve, ECM
P1445Secondary air injection (AIR) switching valve, valve stuck closed, bank 2 – circuit malfunctionWiring, AIR valve, vacuum hose, ECM
P1500Starter signal – circuit malfunctionWiring, ignition switch, engine control relay, ECM
P1520Stop lamp switch – signal malfunctionWiring, stop lamp switch, ECM
P1565Cruise control switch – circuit malfunctionWiring, cruise control switch, ECM
P1566Cruise control switch – circuit malfunctionWiring, cruise control switch, ECM
P1570Cruise control laser radar sensor – malfunctionCruise control laser radar sensor, cruise control module, ECM
P1572Cruise control laser radar sensor – improper aiming of beam axisCruise control laser radar sensor alignment, cruise control laser radar sensor
P1575Cruise control/skid control warning buzzer- malfunctionWiring, warning buzzer, A8S control module
P1578Brake system – malfunctionA8S system, A8S control module
P1600Engine control module (ECM) -supply voltageWiring, ECM
P1605Knock control – malfunctionECM
P1613Secondary air injection (AIR) – malfunctionWiring, AIR, ECM
P1615Data bus, cruise control module – communication errorCAN data bus, cruise control module, ECM
P1616Data bus, cruise control module – communication errorCAN data bus, ECM, cruise control module
P1633Throttle actuator control (TAC) system – malfunctionECM
P1645Body control module (BCM) – malfunction8CM, AIC control module, CAN data bus
P1656Oil control valve – LH bank – malfunctionWiring, oil control valve, ECM
P1663Oil control valve – RH bank – malfunctionWiring, oil control valve, ECM
P1705AT – direct clutch speed sensorWiring, direct clutch speed sensor, ECM
P1765AT – pressure control shift solenoidWiring, shift solenoid, ECM
P1780Park/neutral position (PNP) switch – circuit malfunctionWiring, PNP switch, ECM
P1782Transfer box low ratio switch – circuit malfunctionWiring, transfer box low ratio switch, ECM
P1783Transfer box neutral switch – circuit malfunctionWiring, transfer box neutral switch, ECM
82785Ignition switch ON – malfunctionIgnition switch, engine control relay, wiring
82786Ignition switch OFF – malfunctionIgnition switch, engine control relay, wiring
82791Key unlock warning switch – malfunctionWiring, key unlock warning switch, engine control relay
82795Unrecognized key codeKey, incorrect key
82796Immobilizer system – no communicationKey, transponder, wiring, ECM
82797Communication malfunction 1 – interferenceIncorrect key has been used, wiring, ignition module, ECM
82798Communication malfunction 2Key, transponder, ignition module, wiring, ECM
82799Immobilizer – malfunctionWiring, immobilizer system, ECM