If the engine oil is not changed regularly, what is the most likely fault that can occur to an engine equipped with variable valve timing (VVT)?
A) A no-start condition because the camshaft cannot rotate
B) Low oil pressure diagnostic trouble code (DTC)
C) The filter screens on the actuator control valve become clogged
D) Any of the above

Question

Quizplus · Accepted Answer

If the engine oil is not changed regularly, it can become dirty and cause the filter screens on the actuator control valve to become clogged, affecting the VVT system's performance.

If the Engine Oil Is Not Changed Regularly, What Is