2012 Chevrolet Sonic - Variable Timing Solenoid

Understanding Engine Variable Valve Timing (VVT) Solenoids

Variable valve timing (VVT) solenoids are crucial components in modern engines that utilize variable valve timing technology. VVT solenoids are responsible for controlling the oil pressure flow to the VVT system's camshaft phasers, which allows the engine to adjust the timing of the intake and exhaust valves to optimize engine performance. VVT solenoids are typically located on the cylinder head or engine block, and are connected to the VVT system using oil passages. These solenoids are controlled by the engine's onboard computer, which sends signals to the solenoid to adjust the oil flow to the VVT system as needed. When the VVT solenoids are energized, they open a corresponding valve that allows oil to flow to the system, and when they are turned off, the valve closes to stop oil flow. The VVT solenoids on your vehicle can fail over time and in several ways, including clogging, oil leaks, electrical issues, and more. Signs of a bad VVT solenoid include issues with engine performance, such as rough idle, reduced fuel efficiency, engine knock, lack of power, or it can cause a Check Engine light to appear on the dashboard. It's important to correctly diagnose any issues to avoid decreased fuel economy, degraded engine performance, or worse, damage to your vehicle's engine and internal components such as the VVT actuator. It is also important to perform regular oil changes on any vehicle equipped with variable valve timing, as old oil can lead to engine sludge that can clog oil passages and prevent the system from activating. Shop O'Reilly Auto Parts for the replacement engine parts you need, including VVT solenoids, camshaft actuators, and more to help you get the job done right the first time.