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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 P2440 >> Repair Verification

Repair Verification

  1. Ignition ON, enable and disable the AIR solenoid relay and observe that the check valve operates.
  2. Inspect the AIR hoses/pipes between the pump and the shut-off valve for leaks.
  3. Engine running, enable the AIR pump relay and observe that the AIR Pressure Sensor parameter increases to approximately 10-20 kPa above BARO.