Circuit Description

WARNING: This page is about a different car, the 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Variable Valve Timing (VVT) sensor is also known as camshaft position sensor.

The Variable Valve Timing (VVT) sensor consists of a signal plate and pick-up coil. Signal plate has one tooth and is mounted on each intake camshaft. VVT sensor provides feedback to ECM in order to control intake valve timing. DTC P1346 is set when ECM detects a deviation in crankshaft position sensor and VVT sensor for bank No. 1 (left cylinder head). DTC P1351 is set when ECM detects a deviation in crankshaft position sensor and VVT sensor for bank No. 2 (right cylinder head). Possible causes are:

Mechanical system malfunction (timing belt stretched or timing belt teeth jumped).
Faulty ECM.