Mike's Workshop Manuals
: Service manuals for every vehicle
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Cadillac
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1991
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DeVille Touring
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/Codes
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Pcm Flow Charts Codes E12 To E99
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Pcm Code E38, Open Mat Sensor Circuit
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Test Conditions:
Test Conditions:
PCM codes E14 and E15 not set.
Coolant sensor temperature greater than or equal to 23°F (-5°C).