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Cadillac
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2003
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CTS Automatic
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Repair and Diagnosis
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Engine Performance
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Engine Controls - Self-Diagnostics
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DTC P0447: EVAP Vent Valve Control Circuit Open
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Conditions For Setting DTC
Conditions For Setting DTC
The control module detects low voltage on the control circuit when the driver is commanded OFF.
The fault is present for 50 seconds, cumulative during the drive cycle.