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Home >> Cadillac >> 2006 >> DTS 4.6 9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.6L - DTC P1400 To P2444 >> DTC P2440 >> Repair Verification
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Repair Verification

  1. With the ignition ON and engine OFF, enable and disable the AIR solenoid relay and observe that the solenoid valve operates.
  2. Inspect the AIR hoses/pipes between the pump and the shut-off valve for leaks.
  3. With the engine running, enable the AIR pump relay and observe that the AIR Pressure Sensor parameter increases to approximately 10-15 kPa above BARO.
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