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Home >> Cadillac >> 1988 >> Seville STS >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> DFI Theory/Operation >> Operation >> BCM/ECM Computer System Status Light Descriptions >> "AUTO" Status Indicator

"AUTO" Status Indicator

This indicator is turned on whenever the ECM is operating in closed loop fuel control. Light should come on after the coolant and oxygen sensors have reached normal operating temperatures.