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Home >> Cadillac >> 1990 >> Seville Base, 4T60/ME9 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> ECM Trouble Code Charts >> ECM Code EO91: Park/Neutral Switch Problem >> Failure Conditions:
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Failure Conditions:

Park/neutral switch closed, 4th gear switch open and vehicle speed between 23 and 35 MPH for 10 seconds.

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