Circuit Description

WARNING: This page is about a different car, the 2002 Lexus ES 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 (CMP) sensor.

Vehicle is equipped with 2 VVT sensors. Each VVT sensor consists of a magnet, iron core and pick-up coil. One VVT sensor is mounted in outer corner of each cylinder head, just below valve cover (oil filler cap end). A 3-tooth signal plate is mounted to outer camshaft. DTC P0340 is set when no cranking signal is received by ECM from sensor. DTC P0340 is also set when no signal is received by ECM from sensor with engine speed of 600 RPM or more. Possible causes are:

Open or short in VVT sensor circuit.
Crank position sensor No. 1.
Faulty camshaft timing gear.
Faulty ECM.