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Home >> Pontiac >> 2007 >> Grand Prix Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls & Fuel - 3.8L - DTC P0601 To U0107 >> DTC P2227 >> Circuit/System Verification
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Circuit/System Verification

Ignition ON, observe the scan tool MAP and BARO sensor parameters. The readings should be within 5 kPa of each other, and also the current BARO for your location. Refer to Altitude Versus Barometric Pressure .