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Cadillac
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2007
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XLR V
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls And Fuel - 4.4L - DTC P0171 To DTC 00700
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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.