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Home >> Cadillac >> 1989 >> Seville STS >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DFI ECM Tests W/Codes >> Diagnostic Charts >> ECM Code EO38 - Open Mat Sensor Circuit >> Test Conditions

July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Test Conditions

Codes EO14 and EO15 are clear. Coolant sensor temperature greater than or equal to -5°C.

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