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Home >> Buick >> 2007 >> Lucerne CXS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.6L - DTC P0351 To DTC P2440 >> DTC P0411 >> Circuit/System Verification
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Circuit/System Verification

  1. If any other AIR DTCs are set, perform those diagnostics first.
  2. Engine running, observe that the AIR Pressure Sensor parameter approximately equals BARO.
  3. Engine running, enable the AIR pump relay with a scan tool and observe that the AIR Pressure Sensor parameter equals approximately 10-20 kPa above barometric pressure (BARO).
  4. Engine running, enable the AIR system with a scan tool and observe that the AIR Pressure Sensor parameter equals approximately 8-10 kPa above BARO.
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