DTC P00AF-00: Turbocharger/Supercharger Boost Control 'A' Module Performance: General Description

Electric Waste Gate Actuator (EWGA) controls by-pass valve before turbine. ECM opens by-pass valve for exhaust gas to be by-passed when the pressure of exhaust gas is too low because turbine can be a lack to decrease engine power at low rpm.

Courtesy of HYUNDAI MOTOR AMERICA