SFI SYSTEM 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 or stops fuel injection.

DTC Code	Component	Fail-Safe Operation	Fail-Safe Deactivation Condition
C1476 C1477 C1478	Brake Booster Pressure Sensor	The frequency that the air conditioning system is turned off is increased.	Pass condition detected
P0010 P0016 P0017 P1023 P1360 P1362 P2614	Cam timing control motor	The cam timing control motor with EDU assembly is operated to the most retarded position.	Pass condition detected and then ignition switch turned off
P0011 P0021	VVT system	Idling up (misfire prevention), or power to cam timing control motor is cut Valve timing of bank that is operating normally is fixed at maximum retard angle	Pass condition detected and then ignition switch turned off
P0015	VVT system	Idle up (control of combustion worsening). Fuel cut control is stopped.	Pass condition detected
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 performs fuel cut on all cylinders when the engine speed 3000 rpm or higher.	Pass condition detected
P0107 P0108	Vacuum sensor (manifold absolute pressure sensor)	The ECM calculates the manifold absolute pressure based on 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 P060A P060B P060D P060E P0657 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 5.5° 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 assembly 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 malfunctioning 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
P0335 P0337 P0338	Crankshaft Position Sensor	The ECM limits the engine speed. The ECM sets ignition timing to maximum retard.	Pass condition detected and then ignition switch turned off
P0336	Crankshaft position sensor	Stop and start system is stopped.	Pass condition detected and then ignition switch turned off
P0401 P0403	Exhaust gas recirculation system	The ECM assumes that EGR valve is closed, so that ignition angle is controlled with safety valve.	Pass condition detected and then ignition switch turned off
P0504	Stop light switch assembly	The accelerator pedal opening angle is fixed when there is an accelerator pedal malfunction or history of a malfunction.	Pass condition detected and then ignition switch turned off
P0560	System Voltage	The alternator command is fixed.	Pass condition detected and then ignition switch turned off
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 there is a malfunction in either circuit, the ECM limits the engine output. If there is a malfunction in both circuits, 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
P2237 P2238 P2239 P2252 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

Tech Tips

*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.