Fail-Safe Chart

If any of the following DTCs are stored, 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 and P101D	Air Fuel Ratio Sensor Heater	ECM turns off the air fuel ratio sensor heater.	Ignition switch off
P0037, P0038 and P102D	Heated Oxygen Sensor Heater	ECM turns off the heated oxygen sensor heater.	Ignition switch off
P0102 and P0103	Mass Air Flow Meter Sub-assembly	ECM calculates the ignition timing according to the engine speed and throttle valve position.	Pass condition detected
P0112 and P0113	Intake Air Temperature Sensor	ECM estimates the intake air temperature to be 20°C (68°F).	Pass condition detected
P0115, P0117 and P0118	Engine Coolant Temperature Sensor	ECM estimates the engine coolant temperature to be 80°C (176°F).	Pass condition detected
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0604, P0606, P060A, P060B, P060D, P060E, P0657, P2102, P2103, P2111, P2112, P2118, P2119 and P2135	Electronic Throttle Control System (ETCS)	ECM cuts off the throttle actuator current and the throttle valve returns to a throttle position of 6° by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal position to allow the vehicle to continue at minimal speed.*1	Pass condition detected and then ignition switch turned off
P0300, P0301, P0302, P0303 and P0304*2	Fuel Injector Assembly Electronic Throttle Control System (ETCS)	When a misfire occurs, a fuel cut is performed to prevent a 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. - Fuel cut for all cylinders or for the malfunctioning cylinder is performed.	Pass condition detected and then ignition switch turned off
P0327 and P0328	Knock Sensor	ECM sets the ignition timing to maximum retard.	Ignition switch off
P0351 to P0354	Igniter	ECM cuts the fuel.	Pass condition detected
P0504	Stop Light Switch Assembly	Accelerator pedal angle is fixed.	Pass condition detected
P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138	Accelerator Pedal Position Sensor Assembly	Accelerator pedal position sensor has 2 sensor circuits: Main and Sub. If either circuit malfunctions, the ECM controls the engine using the other circuit. If both circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve closes and the engine idles.	Pass condition detected and then ignition switch turned off
P2237, P2238, P2239, P2252 and P2253	Air Fuel Ratio Sensor	Air-fuel ratio feedback control is stopped. Current to the air fuel ratio sensor heater is cut.	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.