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Home >> Lexus >> 2017 >> GS 450h Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics - Introduction) (2 Of 2) >> SFI System >> Fail-Safe Chart [09/2014 - ] >> Fail-Safe Chart [09/2014 - ]

Fail-Safe Chart [09/2014 - ]

If any of the following DTCs are set, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily.

DTC Component Fail-safe Operation Fail-safe Deactivation Condition
P0031, P0032, P0051, P0052, P101D and P103D Air fuel ratio sensor heater ECM turns off air fuel ratio sensor heater Power switch off
P0037, P0038, P0057, P0058, P103D and P105D Heated oxygen sensor heater ECM turns off heated oxygen sensor heater Power switch off
P0087 and P0088 Fuel pump for high pressure
  • Stop the fuel pump for high pressure
  • Limit the engine speed to 2000 rpm or less
Pass condition detected
P0102 and P0103 Mass air flow meter ECM calculates ignition timing according to engine speed and throttle valve position Pass condition detected
P0112 and P0113 Intake air temperature sensor ECM estimates intake air temperature sensor to be 20°C (68°F) Pass condition detected
P0115, P0117 and P0118 Engine coolant temperature sensor ECM estimates engine coolant temperature sensor to be 80°C (176°F) Pass condition detected
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0604, P0606, P060A, P060E, P1607, P2102, P2103, P2111, P2112, P2118, P2119 and P2135 Electronic throttle control system The ECM cuts off throttle actuator current and the throttle valve returns to 6° throttle position by return spring
The ECM stops the engine and the vehicle can be driven using solely the hybrid system.*1
Pass condition detected and then power switch turned off
P0192 and P0193 Fuel pressure sensor
  • Stop the fuel pump for high pressure
  • Limit the engine speed to 2000 rpm or less
Pass condition detected and then power switch turned off
P0201, P0202, P0203, P0204, P0205 and P0206 Injector driver (EDU)
  • Stop fuel injection for an abnormal cylinder and related other cylinders
  • Limit the engine speed to 3000 rpm or less
Pass condition detected and then power switch turned off
P0327, P0328, P0332 and P0333 Knock sensor The ECM sets ignition timing to maximum retard Power switch off
P0351, P0352, P0353, P0354, P0355 and P0356 Ignition coil assembly The ECM cuts fuel Pass condition detected
P1235 Fuel pump (for high pressure side).
  • Stop the fuel pump for high pressure
  • Limit the engine speed to 2000 rpm or less
Pass condition detected
P1276, P1277, P1278, P1279, P127A, P127B Fuel injector assembly (for port injection)
  • Limit the engine speed to 2000 rpm or less
  • Fuel cut of malfunction cylinder
Pass condition detected and then power switch turned off
P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255, P2256 A/F Sensor Air-fuel ratio feedback control is stopped Pass condition detected and then power switch turned off
NOTE:
  • *1: The vehicle can be driven slowly when the accelerator pedal is depressed slowly. If the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically.
  • *2: Misfire related fail-safe operations occur when catalyst overheat malfunctions occur.