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Buick
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2008
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Allure CX
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System & Fuel System - 3.8L - DTC P0385 To DTC P2108
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DTC P0496
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Circuit/System Verification
Circuit/System Verification
Start the engine.
Seal the EVAP system using the Purge/Seal function with a scan tool.
Observe the FTP sensor with a scan tool. The Fuel Tank Pressure Sensor parameter should be less than 1.7 volts.