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Home >> Ford >> 1991 >> Probe GL, Standard >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - EEC-IV >> Self-Diagnostic System >> Check Engine Light

Check Engine Light

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