Parts & Accessories Spare parts Used original, working. Camshaft Timing Oil Control Solenoid (VVT Solenoid) Part Function This solenoid acts as a pivotal component in the engine system, regulating oil flow to the cam phaser. This allows the computer to control valve timing variably based on engine speed and load, improving fuel efficiency and performance. Signs of Solenoid Failure If this part malfunctions or becomes dirty, the following symptoms may appear: Engine sputtering or rough idle. Weak acceleration and increased fuel consumption. "Check Engine" light illuminated with codes such as P0010 to P0015. Knocking sound upon engine startup. Compatible Vehicles This part is primarily compatible with Toyota 2.4L (2AZ-FE) engines in the following models: Toyota Camry: 2002 to 2011 models. Toyota RAV4: 2001 to 2008 models. Toyota Highlander: 2001 to 2007 models. Toyota Corolla: 2009 to 2013 models (with 2.4L engine). Toyota Solara: 2002 to 2008 models. Lexus HS250h: 2010 to 2012 models.