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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.

FAIL-SAFE CHART

DTCs Components Fail-Safe Operations Fail-Safe Deactivation Conditions
P0031, P0032, P0051 and P0052 Air-Fuel Ratio (A/F) Sensor Heater ECM turns off A/F sensor heater Engine switch off
P0037, P0038, P0057 and P0058 Heated Oxygen (HO2) Sensor Heater ECM turns off HO2 sensor heater Engine 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
P0110, 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, P0607, P0657, P2102, P2103, P2111, P2112, P2118, P2119 and P2135 Electronic Throttle Control System (ETCS) ECM cuts off throttle actuator current and throttle valve returned to 6° 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 engine switch turned off
P0300, P0301, P0302, P0303, P0304, P0305, P0306 (2)
  • Fuel injector
  • Electric Throttle Control System (ETCS)
 When catalyst damage misfire occurs (MIL blinking), following fail-safe operation performed for catalyst overheat malfunction prevention
  1. Under low load and low engine speed
    • Fuel cut performed on malfunctioning cylinder
  2. Under high load and high engine speed
    • 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 Sensor ECM sets ignition timing to maximum retard Engine 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 of circuits malfunctions, ECM controls engine using the other circuit
If both of circuits malfunction, ECM regards accelerator pedal as being released. As a result, throttle valve is closed and engine idles		 Pass condition detected and then engine switch turned off
(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 malfunction occur.
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