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Home >> Cadillac >> 2008 >> DTS 4.6 Y >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 4.6L - DTC P2430 To DTC P2544 >> 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.