What is the reason for the Cruze reporting an intake camshaft performance fault?

[Abel]

The cause of the Oil Control Valve (OCV) malfunction may be incorrect valve timing or the variable valve timing actuator being stuck in the advanced position. Below is detailed information about the camshaft: 1. Introduction: The camshaft is a component in a piston engine that controls the opening and closing of the valves. Although in a four-stroke engine, the camshaft rotates at half the speed of the crankshaft, it still typically operates at high speeds and must endure significant torque. Therefore, the design requires high strength and robust support for the camshaft. 2. Operating Conditions: The camshaft is subjected to periodic impact loads, and the contact stress between the cam and the tappet is very high, with relatively high sliding speeds as well. As a result, the working surface of the cam tends to wear out significantly. To address this, the camshaft journals and the working surfaces of the cams should not only have high dimensional accuracy, low surface roughness, and sufficient rigidity but also require high wear resistance and good lubrication.