Fail-Safe Chart

If any of the following DTCs are stored, the ECM enters failsafe mode to allow the vehicle to be driven temporarily or stops fuel injection.

FAIL-SAFE CHART

DTC Code	Component	Fail-Safe Operation	Fail-Safe Deactivation Condition
P0031 P0032 P101D	Air fuel ratio sensor heater	The ECM turns off the air fuel ratio sensor heater.	Ignition switch off
P0037 P0038 P102D	Heated oxygen sensor heater	The ECM turns off the heated oxygen sensor heater.	Ignition switch off
P0102 P0103	Mass air flow meter	The ECM calculates ignition timing according to the engine speed and throttle valve position.	Pass condition detected
P0112 P0113	Intake air temperature sensor	The ECM estimates the intake air temperature to be 20°C (68°F).	Pass condition detected
P0115 P0117 P0118	Engine coolant temperature sensor	The ECM estimates the engine coolant temperature to be 80°C (176°F).	Pass condition detected
P0120 P0121 P0122 P0123 P0220 P0222 P0223 P0604 P0606 P0607 P060A P060B P060D P060E P0657 P1607 P2102 P2103 P2111 P2112 P2118 P2119 P2135	Electronic throttle control system	The ECM cuts off throttle actuator current and the throttle valve is returned to a 6° throttle position by the return spring. The ECM then adjusts the engine output by controlling fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal angle to allow the vehicle to continue at minimal speed*1.	Pass condition detected and then ignition switch turned off
P0300 P0301 P0302 P0303 P0304*2	Fuel injector Electronic throttle control system	When a catalyst-damaging misfire occurs (MIL blinking), the following fail-safe operation is performed for catalyst overheat malfunction prevention. Under a low load and at a low engine speed: Fuel cut is performed on the malfunctioning cylinder. Under a high load and at a high engine speed: Throttle valve opening angle control is performed. Fuel cut is performed on all cylinders or the malfunction cylinder.	Pass condition detected and then ignition switch turned off
P0327 P0328	Knock sensor	The ECM sets the ignition timing to maximum retard.	Ignition switch off
P0351 to P0354	Ignition coil	The ECM cuts the fuel.	Pass condition detected
P2120 P2121 P2122 P2123 P2125 P2127 P2128 P2138	Accelerator pedal position sensor	The 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 is closed and the 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.