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Home >> Cadillac >> 1988 >> Seville STS >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> DFI ECM Tests W/Codes >> ECM Code EO38 - Open Mat Sensor Circuit >> DFI ECM Tests W/Codes >> Test Conditions:

Test Conditions:

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