Lexus >> GS450h – LS600h – RX400h (2006 – 2009)

ModeL Year Engine identification System
GS450h  3.5L 2006-08 2GR-FSE SFI
LS600h 5.0L 2008-09 2UR-FSE SFI
RX400h  3.3L 2006-08 3MZ-FE SFI

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-11 code Fault location Probable cause
PO, P2, UO Refer to OBD-11 trouble code tables
P1023 Camshaft position (CMP) actuator/position sensor, circuit B, bank 2 – malfunction CMP actuator/position sensor
P1081 HC catalytic converter, switching valve, bank 1 – stuck open Exhaust leak, mechanical fault, wiring, exhaust gas temperature (EGT) sensor, ECM
P1082 HC catalytic converter, switching valve, bank 1 – stuck closed Exhaust leak, mechanical fault, wiring, exhaust gas temperature (EGT) sensor, ECM
P1083 HC catalytic converter, switching valve, bank 2 – stuck open Exhaust leak, mechanical fault, wiring, exhaust gas temperature (EGT) sensor, ECM
P1084 HC catalytic converter, switching valve, bank 2 – stuck closed Exhaust leak, mechanical fault, wiring, exhaust gas temperature (EGT) sensor, 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
P1170 Port injector fuel performance – performance problem injector, fuel pressure, ECM
P117B Direct injector fuel performance – performance problem injector, fuel pressure, ECM
P1200 Fuel pump (FP) relay/ECM – circuit malfunction Wiring, fuel pump/control module, ECM
P12FF Engine control module (ECM), injector driver .,.. circuit malfunction Wiring, fuel injector, ECM
P1235 Fuel high-pressure pump, bank 1 – circuit malfunction Wiring, fuel high-pressure pump, injector control module, bank 1
P1236 Fuel high-pressure pump, bank 2 – circuit malfunction Wiring, fuel high-pressure pump, injector control module, bank 2
P1276 Injector 2, cylinder 1 – circuit malfunction Wiring, fuse, injector, ECM
P1277 Injector 2, cylinder 2 – circuit malfunction Wiring, fuse, injector, ECM
P1278 Injector 2, cylinder 3 – circuit malfunction Wiring, fuse, injector, ECM
P1279 Injector 2, cylinder 4 – circuit malfunction Wiring, fuse, injector, ECM
P127A Injector 2, cylinder 5 – circuit malfunction Wiring, fuse, injector, ECM
P127B Injector 2, cylinder 6 – circuit malfunction Wiring, fuse, injector, ECM
P127C Injector 2, cylinder 7 – circuit malfunction Wiring, fuse, injector, ECM
P127D Injector 2, cylinder 8 – circuit malfunction Wiring, fuse, injector, ECM
P12FF Injector control module – circuit malfunction Wiring, injector control module, injector, ECM
P1300 Ignition control – circuit malfunction Wiring, ignition module, ECM
P1335 Crankshaft position (CKP) sensor – no signal Wiring, CKP sensor, starter motor, ECM
P1340 Camshaft position (CMP) sensor, circuit A – range/performance problem Wiring, CMP, mechanical fault, ECM
P1342 Camshaft position (CMP) sensor, circuit A, low input – circuit malfunction Wiring, CMP, mechanical fault, ECM
P1343 Camshaft position (CMP) sensor, circuit A, high input – circuit malfunction Wiring, CMP, mechanical fault, ECM
P1346 Variable valve timing sensor – LH bank – range/performance problem Valve timing, ECM
P1349 Variable valve timing system – circuit malfunction Valve timing, oil control valve, valve timing control module, ECM
P1360 Camshaft position (CMP) actuator, bank 1, circuit A – circuit malfunction Wiring, CMP, ECM
P1361 Camshaft position (CMP) actuator, bank 2, circuit A – circuit malfunction Wiring, CMP, ECM
P1362 Camshaft position (CMP) actuator, bank 1, circuit B – circuit malfunction Wiring, CMP, ECM
P1363 Camshaft position (CMP) actuator, bank 2, circuit B – circuit malfunction Wiring, CMP, ECM
P1364 Camshaft position (CMP) actuator, bank 1, circuit C – circuit malfunction Wiring, CMP, ECM
P1365 Camshaft position (CMP) actuator, bank 2, circuit C – circuit malfunction Wiring, CMP, ECM
P1366 Camshaft position (CMP) actuator, bank 1, circuit E – circuit malfunction Wiring, CMP, ECM
P1367 Camshaft position (CMP) actuator, bank 2, circuit E – circuit malfunction Wiring, CMP, ECM
P1400 Throttle position (TP) sensor 2 – circuit malfunction Wiring, TP sensor, ECM
P1401 Throttle position (TP) sensor 2 – range/   performance problem TP sensor
P1420 Evaporative emission (EVAP) system – small leak EVAP canister, EVAP canister purge valve, hose leak
P1421 Evaporative emission (EVAP) system – large leak EVAP canister, EVAP canister purge valve, hose leak
P1422 Fuel tank system/small leak detected – mechanical fault Fuel tank system, fuel pump control module
P1423 Fuel tank system/small leak detected – mechanical fault Fuel tank system, fuel pump control module
P1424 Fuel tank system/leak – mechanical fault Fuel tank system, fuel pump control module
P1438 HC catalytic converter, variable valve – circuit low Vacuum switching valve (VSV), wiring, ECM
P1450 Fuel tank pressure sensor- circuit malfunction Wiring, fuel tank pressure sensor, ECM
P1451 Fuel tank pressure sensor, range/performance problem – circuit malfunction Wiring, fuel tank pressure sensor, ECM
P1452 Fuel tank pressure sensor, low input- circuit malfunction Wiring, fuel tank pressure sensor, ECM
P1453 Fuel tank pressure sensor, high input – circuit malfunction Wiring, fuel tank pressure sensor, ECM
P1500 Starter signal – circuit malfunction Wiring, ignition switch, starter relay, ECM
P1520 Stop lamp switch – signal malfunction Wiring, stop lamp switch, ECM
P1565 Cruise control switch – circuit malfunction Wiring, cruise control switch, ECM
P1600 Engine control module (ECM) – supply voltage Wiring, ECM
P1602 Battery voltage monitor – malfunction Wiring, battery, ECM
P1605 Knock control – malfunction ECM
P1607 Cruise control input processor – malfunction Wiring, ECM
P1613 Secondary air injection driver (AIR) – malfunction Wiring open/short circuit, (AIR), ECM
P1614 Secondary air injection driver (AIR), bank 2 – malfunction Wiring open/short circuit, (AIR), ECM
P1616 Controller area network (CAN) data bus – communication malfunction Wiring, cruise control module, ECM
P1617 Cruise control module – circuit malfunction Wiring, cruise control module, ECM
P1633 Engine control module (ECM) – throttle actuator control (TAC) system- malfunction ECM
P1645 Body control module (BCM) – malfunction BCM, AJC control module, wiring
P1656 Oil control valve – malfunction Wiring, oil control valve, ECM
P1780 Park/neutral position (PNP) switch Wiring, PNP switch, ECM
P3190 Decreased engine performance Air induction system, fuel pressure/level, mechanical fault, engine coolant temperature (ECT) sensor, camshaft/   crankshaft (CMP/CKP) sensor, variable valve   timing intake/exhaust sensor, ECM
P3191 Engine does not start Air induction system, fuel pressure/level, mechanical fault, engine coolant temperature (ECT) sensor, camshaft/   crankshaft (CMP/CKP) sensor, variable valve timing intake/exhaust sensor, ECM
P3193 Fuel tank empty Out of fuel, ECM