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Home >> Ford >> 1991 >> Bronco 4.9 Y, Standard, M5OD-R2 >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Self-Diagnostic System >> Check Engine Light

Check Engine Light

The CHECK ENGINE light (if equipped) will illuminate whenever ignition is turned to the ON position (bulb check) or systems related to the EEC-IV system malfunction during normal engine operation. For additional information, see appropriate TESTS W/CODES article in the ENGINE PERFORMANCE Section.