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Home >> Cadillac >> 1989 >> Seville Base >> Repair and Diagnosis >> Engine Performance >> System >> DFI ECM Tests W/Codes >> Diagnostic Charts >> ECM Code EO23 - Est Circuit Problem >> Test Conditions

July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Test Conditions

Ignition on. Engine speed greater than or equal to 304 RPM.

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