The VVT Solenoid meters the oil flow to control the actuation of the VVT Sprocket. The VVT Sprocket mechanically shifts the position of the camshaft. The actuated position is varied based on the PCM commands to advance or retard the engine’s valve timing
The VVT Solenoids are generally located on and/or around the cylinder head block. The VVT Sprockets are located on the camshaft(s).
Yes. They both can affect the vehicle operating condition and cause the MIL light to come on. They both can cause multiple codes to set.