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 Controls (DTC P0140 To P0496)
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Engine Controls Diagnosis
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DTC P0449
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Conditions for Running the DTC
Conditions for Running the DTC
The engine speed is more than 400 RPM.
The system voltage is between 6-18 volts.