Lexus GX470 – LX470 – RX300 – RX330 (1998 – 2009) Trouble Code Info

ModeL Year Engine identification System
GX470 4.7L 2003-09 2UZ-FE SFI
LX47 04.7L 1998-07 2UZ-FE SFI
RX300 3.0L 1999-03 1MZ-FE SFI
RX330 3.3L 2004-06 3MZ-FE SFI

General information

  • Refer to the front of this manual for general test conditions, terminology, detailed descriptions of wiring faults and a general trouble shooter for electrical and mechanical faults.
  • 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.
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Erasing

  • 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 code Fault location Probable cause
PO, P2, UO Refer to OBD-11 trouble code tables
P1100 Barometric pressure (BARO) sensor – circuit malfunction ECM
P1120 Accelerator pedal position (APP) sensor – circuit malfunction Wiring, APP sensor, ECM
P1121 Accelerator pedal position (APP) sensor – range/performance problem APP sensor, ECM
P1125 Throttle actuator control (TAC) motor – circuit malfunction Wiring, TAC motor, ECM
P1126 Throttle actuator control (TAC) clutch – circuit malfunction Wiring, magnetic clutch, ECM
P1127 Throttle actuator control (TAC) power source- circuit malfunction Wiring, ECM
P1128 Throttle actuator control (TAC) lock- malfunction TAC motor, throttle body, ECM
P1129 Throttle actuator control (TAC) system- malfunction TAC system, ECM
P1130 Heated oxygen sensor (H02S) – LH front – range/performance problem Wiring, H02S, ECM
P1133 Heated oxygen sensor (H02S) – LH front- response malfunction H02S
P1135 Heated oxygen sensor (H02S)- LH front- heater circuit malfunction Wiring, H02S, ECM
P1150 Heated oxygen sensor (H02S) – RH front – range/performance problem Wiring, H02S, ECM
P1153 Heated oxygen sensor (H02S) – RH front – response malfunction H02S
P1155 Heated oxygen sensor (H02S) – RH front – heater circuit malfunction Wiring, H02S, ECM
P1200 Fuel pump (FP) relay/engine control module   (ECM) – circuit malfunction Wiring, fuel pump relay, ECM
P1300 Ignition control – cylinder No.1 – circuit malfunction Wiring, ignition coil/module, ECM
P1305 Ignition control – cylinder No.2 – circuit malfunction Wiring, ignition coil/module, ECM
P1310 Ignition control – cylinder No.3 – circuit malfunction Wiring, ignition coil/module, ECM
P1315 Ignition control – cylinder No.4 – circuit malfunction Wiring, ignition coil/module, ECM
P1320 Ignition control – cylinder No.5 – circuit malfunction Wiring, ignition coil/module, ECM
P1325 Ignition control – cylinder No.6 – circuit malfunction Wiring, ignition coil/module, ECM
P1330 Ignition control – cylinder No.7 – circuit malfunction Wiring, ignition coil/module, ECM
P1335 Crankshaft position (CKP) sensor – no signal Wiring, CKP sensor, starter motor, ECM
P1340 0 Ignition control – cylinder No.8 – circuit malfunction Wiring, ignition coil/module, ECM
P1340 fJ Camshaft position (CMP) sensor 2, bank 1 – circuit malfunction Wiring, CMP, mechanical fault, ECM
P1341 Camshaft position (CMP) sensor 2, bank 1 – circuit malfunction Wiring, CMP, mechanical fault, ECM
P1345 Variable valve timing sensor – LH bank – circuit malfunction Wiring, valve timing sensor, ECM
P1346 Variable valve timing sensor – LH bank – range/performance problem Valve timing, ECM
P1349 Variable valve timing system – LH bank – malfunction Valve timing, oil control valve, valve timing control module, ECM
P1350 Variable valve timing sensor – RH bank – circuit malfunction Wiring, valve timing sensor, ECM
P1351 Variable valve timing sensor – RH bank – range/performance problem Valve timing, ECM
P1354 Variable valve “timing system – RH bank – malfunction Valve timing, oil control valve, valve timing control module, ECM
P1400 Throttle position (TP) sensor 2 – circuit malfunction Wiring, TP sensor, ECM
P1401 Throttle position (TP) sensor 2 – range/performance problem TP sensor
P1410 Exhaust gas recirculation (EGR) valve position sensor – malfunction Wiring, EGR valve position sensor, ECM
P1411 Exhaust gas recirculation (EGR) valve position sensor – range/performance problem EGR valve position sensor
P1440 Secondary air injection (AIR) switching valve, bank 1 – circuit malfunction Wiring, AIR valve, ECM
P1441 Secondary air injection (AIR) switching valve, valve stuck open, bank 1 – circuit malfunction Wiring, AIR valve, ECM
P1442 Secondary air injection (AIR) switching valve, valve stuck closed, bank 1 – circuit malfunction Wiring, AIR valve, vacuum hose, ECM
P1443 Secondary air injection (AIR) switching valve, bank 2 – circuit malfunction Wiring, AIR valve, ECM
P1444 Secondary air injection (AIR) switching valve, valve stuck open, bank 2 – circuit malfunction Wiring, AIR valve, ECM
P1445 Secondary air injection (AIR) switching valve, valve stuck closed, bank 2 – circuit malfunction Wiring, AIR valve, vacuum hose, ECM
P1500 Starter signal – circuit malfunction Wiring, ignition switch, engine control relay, ECM
P1520 Stop lamp switch – signal malfunction Wiring, stop lamp switch, ECM
P1565 Cruise control switch – circuit malfunction Wiring, cruise control switch, ECM
P1566 Cruise control switch – circuit malfunction Wiring, cruise control switch, ECM
P1570 Cruise control laser radar sensor – malfunction Cruise control laser radar sensor, cruise control module, ECM
P1572 Cruise control laser radar sensor – improper aiming of beam axis Cruise control laser radar sensor alignment, cruise control laser radar sensor
P1575 Cruise control/skid control warning buzzer- malfunction Wiring, warning buzzer, A8S control module
P1578 Brake system – malfunction A8S system, A8S control module
P1600 Engine control module (ECM) -supply voltage Wiring, ECM
P1605 Knock control – malfunction ECM
P1613 Secondary air injection (AIR) – malfunction Wiring, AIR, ECM
P1615 Data bus, cruise control module – communication error CAN data bus, cruise control module, ECM
P1616 Data bus, cruise control module – communication error CAN data bus, ECM, cruise control module
P1633 Throttle actuator control (TAC) system – malfunction ECM
P1645 Body control module (BCM) – malfunction 8CM, AIC control module, CAN data bus
P1656 Oil control valve – LH bank – malfunction Wiring, oil control valve, ECM
P1663 Oil control valve – RH bank – malfunction Wiring, oil control valve, ECM
P1705 AT – direct clutch speed sensor Wiring, direct clutch speed sensor, ECM
P1765 AT – pressure control shift solenoid Wiring, shift solenoid, ECM
P1780 Park/neutral position (PNP) switch – circuit malfunction Wiring, PNP switch, ECM
P1782 Transfer box low ratio switch – circuit malfunction Wiring, transfer box low ratio switch, ECM
P1783 Transfer box neutral switch – circuit malfunction Wiring, transfer box neutral switch, ECM
82785 Ignition switch ON – malfunction Ignition switch, engine control relay, wiring
82786 Ignition switch OFF – malfunction Ignition switch, engine control relay, wiring
82791 Key unlock warning switch – malfunction Wiring, key unlock warning switch, engine control relay
82795 Unrecognized key code Key, incorrect key
82796 Immobilizer system – no communication Key, transponder, wiring, ECM
82797 Communication malfunction 1 – interference Incorrect key has been used, wiring, ignition module, ECM
82798 Communication malfunction 2 Key, transponder, ignition module, wiring, ECM
82799 Immobilizer – malfunction Wiring, immobilizer system, ECM