Variable Valve Timing System
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2000 Volvo V70, 2000 Volvo S80, 2000 Volvo S70, 1999 Volvo V70, and 1999 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
Variable valve timing system is controlled by the ECM. If circuit or component is faulty, a DTC should set. See appropriate SELF-DIAGNOSTICS article.