SFI SYSTEM FAIL-SAFE CHART

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
P0011, P0015, P0021 and P0025 VVT system

  • Idle up (control of combustion worsening)

  • Stopping fuel cut control

 Pass condition detected
P0031, P0032, P0051, P0052, P101D and P103D Air fuel ratio sensor heater ECM turns off air fuel ratio sensor heater Engine switch off
P0037, P0038, P0057, P0058, P102D and P105D Heated oxygen sensor heater ECM turns off heated oxygen sensor heater Engine switch off
P0102 and P0103 Mass air flow meter sub-assembly 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, P0607, P0657, P2102, P2103, P2111, P2112, P2118, P2119 and P2135 Electronic throttle control system

The ECM cuts off throttle actuator current and the throttle valve is returned to 6° throttle position by return spring

The ECM then adjusts engine output by controlling fuel injection (intermittent fuel-cut) and ignition timing in accordance with accelerator pedal angle, to allow vehicle to continue at minimal speed*1

 Pass condition detected and then engine switch turned off
P0300, P0301, P0302, P0303, P0304, P0305 and P0306*2

  • Fuel injector assembly

  • Electronic throttle control system

When misfire occurs, fuel cut is performed for catalyst overheat malfunction prevention


  • During normal load and normal engine speed (MIL is blinking)

    - Fuel cut is performed on malfunctioning cylinder


  • During high load and high engine speed (MIL is blinking)

    - Throttle valve opening angle control is performed

    - All cylinder fuel cut or malfunction cylinder fuel cut

 Pass condition detected and then engine switch turned off
P0327, P0328, P0332 and P0333 Knock control sensor The ECM sets ignition timing to maximum retard Engine switch off
P0351 to P0356 Igniter The ECM cuts fuel Pass condition detected
P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138 Accelerator pedal sensor assembly

Accelerator pedal sensor assembly has 2 sensor circuits: Main and Sub

If either circuit malfunctions, the ECM controls engine using the other circuit

If both circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is closed and the engine idles

 Pass condition detected and then engine 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.