HYUNDAI SANTA FE (DM) V6 DTC P0660 Intake Manifold Tuning Valve Control

P0660 Intake Manifold Tuning Valve Control Circuit/Open (Bank 1) VIS(Variable intake system) is a device that varies the length of the intake manifold to generate maximum power at a certain RPM. VIS lengthens the intake manifold to improve the torque at low RPM when the vehicle speed is low while it shortens the intake manifold to raise torque at high RPM when the vehicle speed is high. PCU controls VIS using RPM signal.