P1346 LEXUS, TOYOTA: VARIABLE VALVE TIMING SENSOR BANK 1 RANGE/PERFORMANCE PROBLEM
POST UPDATED IN June, 2023
P1346 LEXUS, TOYOTA: VARIABLE VALVE TIMING SENSOR BANK 1 RANGE/PERFORMANCE PROBLEM
Several vehicle manufacturers use real-time cam timing adjustment mechanisms, they are usually called VVT (Variable Valve Timing). This system commonly consists of a mechanical device that allows the camshaft to move through an angular range related to the pulley that is driven by a belt. Hydraulic operation is regulated by an oil control valve. This valve is handled by a pulse width modulating electrical current to a solenoid, which causes changes to the valve hole.
The VVT system includes a device called the Variable Valve Time Sensor, which consists of a signal plate and a receiver coil. The signal plate has 1 tooth on its external circumference. This is installed on the intake camshafts. As the camshafts begin to rotate, the relief of the signal plate and the air space of the coil undergo changes that create variations in the magnetic field and generate an electromotive force from the coil. The actual angle of the camshaft is detected by the VVT Sensor and provides a feedback signal to the ECM (Engine Control Module) for intake valve timing control, as required by the conditions.
The diagnostic code P1346 OBDII is a specific code, and about the manufacturers Lexus and Toyota, it is used to indicate that the Variable Valve Time Sensor for bank 1, which may have experienced performance problems.
The reasons for setting the fault code P1346 OBD2 are
The steps to solve the DTC code P1346 OBDII are the following:
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