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Cadillac
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1989
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Seville Base
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Repair and Diagnosis
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Engine Performance
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System
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DFI ECM Tests W/Codes
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Diagnostic Charts
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ECM Code EO21 - Shorted TPS Circuit
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Failure Conditions
Failure Conditions
Throttle Position Sensor (TPS) value greater than or equal to 80 degrees for 3 seconds.