Lexus OBD/OBD2 Codes >> GS450h – LS600h – RX400h (2006 – 2009)

ModeLYearEngine identificationSystem
GS450h  3.5L2006-082GR-FSESFI
LS600h 5.0L2008-092UR-FSESFI
RX400h  3.3L2006-083MZ-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-11 codeFault locationProbable cause
PO, P2, UORefer to OBD-11 trouble code tables
P1023Camshaft position (CMP) actuator/position sensor, circuit B, bank 2 – malfunctionCMP actuator/position sensor
P1081HC catalytic converter, switching valve, bank 1 – stuck openExhaust leak, mechanical fault, wiring, exhaust gas temperature (EGT) sensor, ECM
P1082HC catalytic converter, switching valve, bank 1 – stuck closedExhaust leak, mechanical fault, wiring, exhaust gas temperature (EGT) sensor, ECM
P1083HC catalytic converter, switching valve, bank 2 – stuck openExhaust leak, mechanical fault, wiring, exhaust gas temperature (EGT) sensor, ECM
P1084HC catalytic converter, switching valve, bank 2 – stuck closedExhaust leak, mechanical fault, wiring, exhaust gas temperature (EGT) sensor, ECM
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
P1170Port injector fuel performance – performance probleminjector, fuel pressure, ECM
P117BDirect injector fuel performance – performance probleminjector, fuel pressure, ECM
P1200Fuel pump (FP) relay/ECM – circuit malfunctionWiring, fuel pump/control module, ECM
P12FFEngine control module (ECM), injector driver .,.. circuit malfunctionWiring, fuel injector, ECM
P1235Fuel high-pressure pump, bank 1 – circuit malfunctionWiring, fuel high-pressure pump, injector control module, bank 1
P1236Fuel high-pressure pump, bank 2 – circuit malfunctionWiring, fuel high-pressure pump, injector control module, bank 2
P1276Injector 2, cylinder 1 – circuit malfunctionWiring, fuse, injector, ECM
P1277Injector 2, cylinder 2 – circuit malfunctionWiring, fuse, injector, ECM
P1278Injector 2, cylinder 3 – circuit malfunctionWiring, fuse, injector, ECM
P1279Injector 2, cylinder 4 – circuit malfunctionWiring, fuse, injector, ECM
P127AInjector 2, cylinder 5 – circuit malfunctionWiring, fuse, injector, ECM
P127BInjector 2, cylinder 6 – circuit malfunctionWiring, fuse, injector, ECM
P127CInjector 2, cylinder 7 – circuit malfunctionWiring, fuse, injector, ECM
P127DInjector 2, cylinder 8 – circuit malfunctionWiring, fuse, injector, ECM
P12FFInjector control module – circuit malfunctionWiring, injector control module, injector, ECM
P1300Ignition control – circuit malfunctionWiring, ignition module, ECM
P1335Crankshaft position (CKP) sensor – no signalWiring, CKP sensor, starter motor, ECM
P1340Camshaft position (CMP) sensor, circuit A – range/performance problemWiring, CMP, mechanical fault, ECM
P1342Camshaft position (CMP) sensor, circuit A, low input – circuit malfunctionWiring, CMP, mechanical fault, ECM
P1343Camshaft position (CMP) sensor, circuit A, high input – circuit malfunctionWiring, CMP, mechanical fault, ECM
P1346Variable valve timing sensor – LH bank – range/performance problemValve timing, ECM
P1349Variable valve timing system – circuit malfunctionValve timing, oil control valve, valve timing control module, ECM
P1360Camshaft position (CMP) actuator, bank 1, circuit A – circuit malfunctionWiring, CMP, ECM
P1361Camshaft position (CMP) actuator, bank 2, circuit A – circuit malfunctionWiring, CMP, ECM
P1362Camshaft position (CMP) actuator, bank 1, circuit B – circuit malfunctionWiring, CMP, ECM
P1363Camshaft position (CMP) actuator, bank 2, circuit B – circuit malfunctionWiring, CMP, ECM
P1364Camshaft position (CMP) actuator, bank 1, circuit C – circuit malfunctionWiring, CMP, ECM
P1365Camshaft position (CMP) actuator, bank 2, circuit C – circuit malfunctionWiring, CMP, ECM
P1366Camshaft position (CMP) actuator, bank 1, circuit E – circuit malfunctionWiring, CMP, ECM
P1367Camshaft position (CMP) actuator, bank 2, circuit E – circuit malfunctionWiring, CMP, ECM
P1400Throttle position (TP) sensor 2 – circuit malfunctionWiring, TP sensor, ECM
P1401Throttle position (TP) sensor 2 – range/   performance problemTP sensor
P1420Evaporative emission (EVAP) system – small leakEVAP canister, EVAP canister purge valve, hose leak
P1421Evaporative emission (EVAP) system – large leakEVAP canister, EVAP canister purge valve, hose leak
P1422Fuel tank system/small leak detected – mechanical faultFuel tank system, fuel pump control module
P1423Fuel tank system/small leak detected – mechanical faultFuel tank system, fuel pump control module
P1424Fuel tank system/leak – mechanical faultFuel tank system, fuel pump control module
P1438HC catalytic converter, variable valve – circuit lowVacuum switching valve (VSV), wiring, ECM
P1450Fuel tank pressure sensor- circuit malfunctionWiring, fuel tank pressure sensor, ECM
P1451Fuel tank pressure sensor, range/performance problem – circuit malfunctionWiring, fuel tank pressure sensor, ECM
P1452Fuel tank pressure sensor, low input- circuit malfunctionWiring, fuel tank pressure sensor, ECM
P1453Fuel tank pressure sensor, high input – circuit malfunctionWiring, fuel tank pressure sensor, ECM
P1500Starter signal – circuit malfunctionWiring, ignition switch, starter relay, ECM
P1520Stop lamp switch – signal malfunctionWiring, stop lamp switch, ECM
P1565Cruise control switch – circuit malfunctionWiring, cruise control switch, ECM
P1600Engine control module (ECM) – supply voltageWiring, ECM
P1602Battery voltage monitor – malfunctionWiring, battery, ECM
P1605Knock control – malfunctionECM
P1607Cruise control input processor – malfunctionWiring, ECM
P1613Secondary air injection driver (AIR) – malfunctionWiring open/short circuit, (AIR), ECM
P1614Secondary air injection driver (AIR), bank 2 – malfunctionWiring open/short circuit, (AIR), ECM
P1616Controller area network (CAN) data bus – communication malfunctionWiring, cruise control module, ECM
P1617Cruise control module – circuit malfunctionWiring, cruise control module, ECM
P1633Engine control module (ECM) – throttle actuator control (TAC) system- malfunctionECM
P1645Body control module (BCM) – malfunctionBCM, AJC control module, wiring
P1656Oil control valve – malfunctionWiring, oil control valve, ECM
P1780Park/neutral position (PNP) switchWiring, PNP switch, ECM
P3190Decreased engine performanceAir induction system, fuel pressure/level, mechanical fault, engine coolant temperature (ECT) sensor, camshaft/   crankshaft (CMP/CKP) sensor, variable valve   timing intake/exhaust sensor, ECM
P3191Engine does not startAir induction system, fuel pressure/level, mechanical fault, engine coolant temperature (ECT) sensor, camshaft/   crankshaft (CMP/CKP) sensor, variable valve timing intake/exhaust sensor, ECM
P3193Fuel tank emptyOut of fuel, ECM