SFI SYSTEM FAIL-SAFE CHART

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

DTC Code Component Fail-Safe Operation Fail-Safe Deactivation Condition
P0011 VVT system

  • Idling up

  • Value timing of bank that is operating normally is fixed at maximum retard angle

 Pass condition detected and then ignition switch off
P0031, P0032 and P101D Air fuel ratio sensor heater ECM turns off air fuel ratio sensor heater. Ignition switch off
P0037, P0038 and P102D Heated oxygen sensor heater ECM turns off heated oxygen sensor heater. Ignition switch off
P0102 and P0103 Mass air flow meter ECM calculates ignition timing according to engine speed and throttle valve position. Pass condition detected
P0105, P0107 and P0108 Vacuum sensor

Intake air pressure is adjusted using a value calculated according to the throttle valve opening angle and engine speed.

Engine speed is limited to 3000 rpm or less.

 Pass condition detected
P0112 and P0113 Intake air temperature sensor ECM estimates intake air temperature 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
P0136 Heated oxygen sensor Air fuel ratio feedback control is stopped. Ignition switch off
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0604, P0606, P0607, P060A, P060D, P060E, P0657, P2102, P2103, P2111, P2112, P2118, P2119 and P2135 Electronic throttle control system

ECM cuts off throttle actuator current and throttle valve is returned to 5.5° throttle position by return spring.

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

 Pass condition detected and then ignition switch turned off
P0171 and P0172 Fuel trim Air fuel ratio feedback control is stopped. Pass condition detected and then ignition switch turned off
P0327 and P0328 Knock sensor ECM sets ignition timing to maximum retard. Ignition switch off
P0351, P0352, P0353 and P0354 Igniter ECM cuts fuel. Pass condition detected
P1046, P1047, P1049, P104A, P1055, P2646, P2647, P2648, P2649, P264A and U011B VALVEMATIC system

Power to the continuously variable valve lift controller assembly is cut.*2

VVT(IN): The adjustable range is limited.

VVT(EX): Fixed to a set value.

 Ignition switch off
P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138 Accelerator pedal position sensor

Accelerator pedal position sensor has 2 sensor circuits: Main and Sub.

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

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

 Pass condition detected and then ignition switch turned off

Note


  • *1: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly. If the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically.

  • *2: When the engine continues to run while power to the continuously variable valve lift controller assembly is cut, the VALVEMATIC duration gradually changes to the minimum duration. When the duration reaches the minimum, the vehicle speed cannot exceed 10 to 60 km/h (6 to 37 mph).