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Buick
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2003
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Century Base
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls Self-Diagnostics - 3.1L Engine
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Diagnostic Tests
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DTC P0446: EVAP Vent System Performance
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Test Description
Test Description
The number below refers to the step number in the diagnostic procedure.
4
- This test determines if the failure is present or intermittent.