Camshaft Timing Oil Control Valve (VVT Solenoid) Part Function This valve serves 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 Valve Damage If this part malfunctions or becomes dirty, the following symptoms may appear: Rough idle or engine instability at idle. Weak acceleration and increased fuel consumption. "Check Engine" light illuminated with codes such as P0010 to P0015. A ticking sound upon engine startup. Compatible Cars 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. Note: The part is original, from the agency, and unused.