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Home >> Cadillac >> 1990 >> Seville Base, 4T60/ME9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> ECM Trouble Code Charts >> ECM Code EO66: Engine Rpm Too High With Cruise Engaged >> Failure Conditions:

Failure Conditions:

Engine RPM 4800 or greater for .25 second.

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