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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 EO38 - Open Mat Sensor Circuit
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Test Conditions
Test Conditions
Codes EO14 and EO15 are clear. Coolant sensor temperature greater than or equal to -5°C.