Engine Control System: Fail-safe

DTC No.	Detected items	Engine operating condition in fail-safe mode
U1024	Can communication circuit	VVEL actuator motor relay is turned off, and VVEL value is become at a minimum angle. Engine speed will not rise more than 3, 500 RPM due to the fuel cut.
U0284	Active grille shutter	ECM operates active grille shutter to fully-open position.
U1040, U1044	LIN 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.
P0014, P0015, P0017, P0019, P0024, P0025	Exhaust valve timing control	The signal is not energized to the exhaust valve timing control magnet retarder and the magnet retarder control does not function.
P0087	FRP control system	Engine torque is limited. VVEL value is maintained at a fixed angle.
P0088	FRP control system	Engine speed is limited.
P0090	FRP control system	Engine torque is limited. VVEL value is maintained at a fixed angle.
P00B3, P00B4	Engine coolant temperature sensor 2	High coolant temperature control does not function.
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 1 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 1 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.
P0190	FRP sensor	Engine speed is limited. High pressure fuel pump is activated at maximum discharge pressure.
P0196, P0197, P0198	Engine oil temperature sensor	Exhaust valve timing control does not function.
P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208	Injector	Engine torque is limited. Fuel injection shut-off of malfunction cylinder. Mixture ratio feedback control does not function. Idle engine speed is increased.
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.
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 decrees) by the return spring. The position of the following components is fixed. Intake valve timing control solenoid valve Exhaust valve timing control solenoid valve ASCD operation may be deactivated.
P0605, P0606, P060B, P062D, P062E	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 decrees) by the return spring. The position of the following components is fixed. Intake valve timing control solenoid valve Exhaust valve timing control solenoid valve ASCD 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 decrees) by the return spring. The position of the following components is fixed. Intake valve timing control solenoid valve Exhaust valve timing control solenoid valve Engine torque may be limited. ASCD operation may be deactivated.
P062B	ECM	Type 1 Engine torque is limited. Idle engine speed is increased. Fuel injector power supply shut-off. High fuel pressure limitation.
P062B	ECM	Type 2 Engine torque is limited. Fuel injection shut-off of malfunction cylinder. Mixture ratio feedback control does not function. Idle engine speed is increased.
P0643	ECM	ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (Approx. 5 decrees) by the return spring. The position of the following components is fixed. Intake valve timing control solenoid valve Exhaust valve timing control solenoid valve
P1087, P1088	VVEL control function	VVEL of normal bank is controlled at VVEL angle of abnormal bank. Engine speed will not rise more than 3, 500 RPM due to the fuel cut.
P1089, P1092	VVEL control shaft position sensor	VVEL value is maintained at a fixed angle. Engine speed will not rise more than 3, 500 RPM due to the fuel cut
P1090, P1093	VVEL actuator motor	VVEL of normal bank is controlled at VVEL angle of abnormal bank. Engine speed will not rise more than 3, 500 RPM due to the fuel cut.
P1090, P1093	VVEL actuator motor	VVEL actuator motor relay is turned off, and VVEL value is become at a minimum angle. Engine speed will not rise more than 3, 500 RPM due to the fuel cut.
P1091	VVEL actuator motor relay	VVEL actuator motor relay is turned off, and VVEL value is become at a minimum angle. Engine speed will not rise more than 3, 500 RPM due to the fuel cut.
P1197	Out of gas	Engine torque is limited. VVEL value is maintained at a fixed angle.
P1606	VVEL control module	VVEL actuator motor relay is turned off, and VVEL value is become at a minimum angle. Engine speed will not rise more than 3, 500 RPM due to the fuel cut.
P1608	VVEL control shaft position sensor	VVEL actuator motor relay is turned off, and VVEL value is become at a minimum angle. Engine speed will not rise more than 3, 500 RPM due to the fuel cut.
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 because of 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 by 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.
P26A3, P26A5, P26A6, P26A7	Multi-way control valve	When detecting a malfunction with the valve closed, ECM fully opens the valve. When detecting a malfunction with the valve opened, ECM maintains valve angle. When detecting a malfunction in sensor, ECM fully opens the valve. ECM limits the engine output depending on malfunctions.