Engine Control System: Fail-safe

DTC No.	Detected items	Engine operating condition in fail-safe mode
U0101	CAN communication line	ECM operates active grille shutter to fully-open position.
U0284	Active grille shutter	ECM operates active grille shutter to fully-open position.
U1040	Engine communication line	ECM operates active grille shutter to fully-open position.
P0011, P0012, P0016, P0018, P0021, P0022	Intake valve timing control	The signal is not energized to the intake valve timing control solenoid valve and the valve control does not function. ECM activates the IVT intermediate lock control solenoid valve to bring the cam sprocket into an intermediate lock condition.
P0014, P0015, P0017, P0019, P0024, P0025	Exhaust valve timing control	The signal is not energized to the exhaust valve timing control solenoid valve and the valve control does not function.
P0101, P0102, P0103	Mass air flow sensor circuit	Engine speed will not rise more than 2, 400 RPM due to the fuel cut.
P0117, P0118	Engine coolant temperature sensor circuit	Engine coolant temperature will be determined by ECM based on the following condition. CONSULT displays the engine coolant temperature decided by ECM.
		Condition	Engine coolant temperature decided (CONSULT display)
		Just as ignition switch is turned ON or START	40°C (104°F)
		Approx. 4 minutes or more after engine starting	80°C (176°F)
		Except as shown above	40 - 80°C (104 - 176°F) (Depends on the time)
		When the fail-safe system for engine coolant temperature sensor is activated, the cooling fan operates while engine is running.
P0122, P0123, P0222, P0223, P2135	Throttle position sensor	The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10 degrees. The ECM regulates the opening speed of the throttle valve to be slower than the normal condition. Therefore, the acceleration will be poor.
P0196, P0197, P0198	Engine oil temperature sensor	Intake valve timing control does not function.
P0500	Vehicle speed sensor	The cooling fan operates (Highest) while engine is running.
P0524	Engine oil pressure	ECM illuminates oil pressure warning lamp on the combination meter. Engine speed will not rise more than 4, 000 RPM due to the fuel cut. Fail-safe is canceled when ignition switch OFF → ON.
P052A, P052B, P052C, P052D	Intake valve timing intermediate lock control	-
P059F	Active grille shutter	When a voltage and temperature related malfunction is detected, the active grille shutter stops at the position of detection. Except for the above case, operates the active grille shutter to fully opened position.
P0603, P0607	ECM	Engine torque may be limited.
P0604	ECM	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring. The position of the following components is fixed. Intake valve timing control solenoid valve Exhaust valve timing control solenoid valve Intake manifold runner control valve ICC operation may be deactivated.
P0605, P0606, P060B	ECM	NOTE: Fail-safe may not occur depending on malfunction type. ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring. The position of the following components is fixed. Intake valve timing control solenoid valve Exhaust valve timing control solenoid valve Intake manifold runner control valve ICC operation may be deactivated.
P060A	ECM	NOTE: Fail-safe may not occur depending on malfunction type. ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring. The position of the following components is fixed. Intake valve timing control solenoid valve Exhaust valve timing control solenoid valve Intake manifold runner control valve Engine torque may be limited. ICC operation may be deactivated.
P0643	Sensor power supply	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring. The position of the following components is fixed. Intake valve timing control solenoid valve Exhaust valve timing control solenoid valve Intake manifold runner control valve
P1575, P1805	Brake switch	ECM controls the electric throttle control actuator by regulating the throttle opening to a small range. Therefore, acceleration will be poor.
		Vehicle condition	Driving condition
		When engine is idling	Normal
		When accelerating	Poor acceleration
P2100, P2103	Throttle control motor relay	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P2101	Electric throttle control function	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P2118	Throttle control motor	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P2119	Electric throttle control actuator	(When electric throttle control actuator does not function properly due to the return spring malfunction:) ECM controls the electric throttle actuator by regulating the throttle opening around the idle position. The engine speed will not rise more than 2, 000 RPM.
		(When throttle valve opening angle in fail-safe mode is not in specified range:) ECM controls the electric throttle control actuator by regulating the throttle opening to 20 degrees or less.
		(When ECM detects the throttle valve is stuck open:) While the vehicle is being driven, it slows down gradually because of fuel cut. After the vehicle stops, the engine stalls. The engine can restart in the N or P position, and engine speed will not exceed 1, 000 RPM or more.
P2122, P2123, P2127, P2128, P2138	Accelerator pedal position sensor	The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10 degrees. The ECM regulates the opening speed of the throttle valve to be slower than the normal condition. Therefore, the acceleration will be poor.