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Chevrolet
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2006
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Impala Police, 3.5 K
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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 - 3.5L - DTC P0442 To DTC P2A01
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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 within -1 to +1 inch H2O.