DTC Description

DTC DETECTION LOGIC 

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0021-00	INT/V TIM CONT-B2 ("A" camshaft position - timing over-advanced or system performance bank 2)	A	Diagnosis condition	Ignition switch: ON Engine speed: 1, 200 - 3, 175 RPM Engine coolant temperature: 60 - 120°C (140 - 248°F) Battery voltage: 11 - 16 V
			Signal (terminal)	-
			Threshold	During the advanced control of intake valve timing control, the angle difference between actual angle and target angle is 13 degrees or more
			Diagnosis delay time	6 seconds
		B	Diagnosis condition	Ignition switch: ON Engine speed: 500 - 2, 000 RPM [when vehicle speed is less than 4 km/h (2.5 MPH)] Engine speed: 1, 200 - 2, 000 RPM [when vehicle speed is 4 km/h (2.5 MPH) or more] Engine coolant temperature: 60 - 120°C (140 - 248°F) Battery voltage: 11 - 16 V
			Signal (terminal)	-
			Threshold	During the advanced control of intake valve timing control, the absolute difference between valve timing control reference position and base angle is 13 degrees or more
			Diagnosis delay time	3 seconds

POSSIBLE CAUSE 

Malfunction A

• Electric intake valve timing (IVT) control actuator (bank 2)
• Harness and connectors [Electric IVT control actuator (bank 2) motor control circuit is open or shorted.]
• Foreign matter caught at the electric IVT control actuator (bank 2)

Malfunction B

• Timing chain installation
• Intake camshaft sprocket (bank 2) wear

FAIL-SAFE 

Engine Control System 

Fail safe mode	Vehicle behavior
Device fix mode	Fixes electric intake valve timing control motor in the reference position. Fixes exhaust valve timing control solenoid valve in the reference position. The Intake manifold runner control valve motor is turned OFF (Intake manifold runner control valve opens).
Others	ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.) NOTE: When VTC mechanism sticks, camshaft position does not change from position of stuck angle.

Idle Start/Stop System 

When a DTC is detected, the start/stop indicator lamp blinks slowly and the idle start/stop system operation is prohibited. When ECM detects error while operating the idle start/stop system, ECM restarts the engine.