EAS Valve

The valve in an emission control system governing the airflow from the air pump in connection with the EAC valve. When its solenoid is energized, air is directed into the exhaust ports to increase oxidation and accelerate catalytic converter heat-up to operating temperature, and when its solenoid is de-energized, it switches airflow between the converter beds to help the oxidizing catalyst to decrease the CO and HC levels

Dictionary of automotive terms. 2015.

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