Mike's Workshop Manuals
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Buick
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2004
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Century Base
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Repair and Diagnosis
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Engine Performance
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Engine Controls (DTC P0140 To P0496)
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Engine Controls Diagnosis
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DTC P0315
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Conditions for Running the DTC
Conditions for Running the DTC
DTCs P0336, P0341, P1374 are not set.
The engine coolant temperature (ECT) is more than 70°C (158°F).