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Home >> BMW >> 1990 >> 750iL >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnosis 7-Series V12 >> Component Tests >> Check Engine Light >> Check Function

Check Function

The control unit supplies the CHECK ENGINE light with ground potential as soon as an exhaust-emission-related defect is detected. As a check, CHECK ENGINE lights constantly after ignition is turned on.

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