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Home › Buick › 1991 › Reatta 2D Coupe › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes - Pcm/BCM › Output Display Codes › ECM Output Parameters › EO05

ECM Output Parameters: EO05

#1 coolant fan relay (FAN REL 1) display is LO when coolant fan is energized.

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