DTC P0010: Camshaft Position "A" Actuator Circuit (Bank 1); DTC P0020: Camshaft Position "A" Actuator Circuit (Bank 2) [11/2021 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.

The electric VVT changes the valve timing using a motor. In comparison to a conventional hydraulic VVT, the valve timing range is greater and the VVT operates even when the engine speed is low or the engine is cold. As a result, it is possible to increase engine output and mileage.

The camshaft timing control motor is equipped with a self diagnostic function, which is used to output diagnosis signals (VTM) to the ECM.

Part and Terminal Name	Function
Camshaft timing control motor	Through its electric motor, operates camshaft timing gear assembly. Interior driver (EDU) detects and performs malfunction diagnosis of motor control, motor speed and rotation direction.
Camshaft timing gear assembly	Changes valve timing by rotating timing chain sprocket.
ECM	Outputs target speed and motor rotation direction in response to driving conditions.
+B	Power supply (when engine switch on (IG), 12 V or higher)
PGND	Power supply ground
VTP	Inputs motor activation signal from ECM.
VTS	Outputs actual motor speed.
VTD	Outputs actual rotation direction.
VTM	Outputs malfunction diagnosis results as a duty ratio. Open circuit in VTP and VTM Normal Internal malfunction in driver Malfunction in motor rotation sensor of driver

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0010	Camshaft Position "A" Actuator Circuit (Bank 1)	One of the following conditions is met for 3 seconds or more (1 trip detection logic). Camshaft timing control motor (bank 1) IC has overheated. Open in camshaft timing control motor (bank 1) circuit. Camshaft timing control motor (bank 1) has overcurrent.	Camshaft timing control motor (bank 1) Camshaft timing gear assembly (bank 1)	Comes on	DTC stored
P0020	Camshaft Position "A" Actuator Circuit (Bank 2)	One of the following conditions is met for 3 seconds or more (1 trip detection logic). Camshaft timing control motor (bank 2) IC has overheated. Open in camshaft timing control motor (bank 2) circuit. Camshaft timing control motor (bank 2) has overcurrent.	Camshaft timing control motor (bank 2) Camshaft timing gear assembly (bank 2)	Comes on	DTC stored

SYMPTOMS AND FAIL-SAFE OPERATION DURING CAMSHAFT CONTROL MOTOR MALFUNCTION

Vehicle Condition	Fail-Safe
Deterioration of driving performance as result of engine combustion degradation Engine output deficiency	Power to camshaft timing control motor is cut Valve timing of bank that is operating normally is fixed at maximum retard angle