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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 EO20: Open Fuel Pump Circuit › Failure Conditions:

Failure Conditions:

Fuel pump feedback voltage less than or equal to 2 volts for one second or more.

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