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Home › Cadillac › 1990 › Seville Base, 440T4/ME9 › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes › ECM Trouble Code Charts › ECM Code EO91: Park/Neutral Switch Problem › Action:

ECM Code EO91: Park/Neutral Switch Problem: Action:

ECM will set Code EO91.

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