The camshaft position actuator solenoid regulates engine oil pressure. It directs oil to the variable valve timing (VVT) phaser gear on the intake camshaft of Bank 1 (referred to as Bank A). By adjusting oil flow, it advances or retards camshaft timing. This improves engine efficiency and power across the RPM range. If the solenoid clogs with dirty oil, VVT operation fails, causing performance loss and timing codes.
Mechanic Glossary
A Camshaft Position Actuator Bank
The solenoid valve that controls oil pressure to the variable valve timing gear on Bank A (usually Bank 1, intake camshaft).
Frequently Asked Questions
It means the engine computer cannot control the position of the intake camshaft on Bank 1. This is usually due to a stuck VVT solenoid or low oil pressure.
It is typically bolted into the cylinder head near the front of the valve cover, aligned with the camshaft phaser gear.
Yes. The actuator solenoid has tiny oil passages that clog easily with sludge. Regular oil changes are critical for VVT systems.