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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.

DTCs Components Fail-Safe Operations Fail-Safe Deactivation Conditions
P0031, P0032, P0051, P0052, P101D and P103D Air Fuel Ratio (A/F) Sensor Heater ECM turns off A/F sensor heater. Ignition switch off
P0037, P0038, P0057, P0058, P102D and P105D Heated Oxygen (HO2) Sensor Heater ECM turns off HO2 sensor heater. Ignition switch off
P0102 and P0103 Mass Air Flow (MAF) Meter ECM calculates ignition timing according to engine speed and throttle valve position. Pass condition detected
P0112 and P0113 Intake Air Temperature (IAT) Sensor ECM estimates IAT to be 20°C (68°F). Pass condition detected
P0115, P0117 and P0118 Engine Coolant Temperature (ECT) Sensor ECM estimates ECT to be 80°C (176°F). Pass condition detected
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0604, P0606, P060A, P060B, P060D, P060E, P0657, P1607, P2102, P2103, P2111, P2112, P2118, P2119 and P2135 Electronic Throttle Control System (ETCS) ECM cuts off throttle actuator current and throttle valve returned to 7° 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
P0300, P0301, P0302, P0303, P0304, P0305 and P0306*2
  • Fuel Injector Assembly
  • Electronic Throttle Control System (ETCS)
 When a misfire occurs, fuel cut is performed to prevent malfunction due to catalyst overheating.
  • During normal load and normal engine speed (MIL is blinking):
    • Fuel cut is performed on the malfunctioning cylinder.
  • During high load and high engine speed (MIL is blinking):
    • Throttle valve opening angle control is performed.
    • All cylinder fuel cut or malfunctioning cylinder fuel cut is performed.
 Pass condition detected and then ignition switch turned off
P0327, P0328, P0332 and P0333 Knock Sensor ECM sets ignition timing to maximum retard. Ignition switch off
P0351 to P0356 Igniter ECM cuts fuel. Pass condition detected
P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138 Accelerator Pedal Position (APP) Sensor APP 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

HINT: 

*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: Misfire related fail-safe operations occur when catalyst overheat malfunctions occur.

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