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DTC P04DB - Crankcase Ventilation System Disconnected

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P04DB - CRANKCASE VENTILATION SYSTEM DISCONNECTED

Description:  This DTC sets when the crankcase pressure sensor is disconnected.
Possible Causes: 
  • Disconnected hose from crankcase to one side of the crankcase pressure sensor
  • Disconnected hose from intake manifold to one side of the crankcase pressure sensor
  • Damaged or pinched PCV hose o-ring seal
  • Damaged oil level indicator o-ring seal
  • Incorrectly installed oil level indicator
  • Incorrectly installed oil cap
  • Disconnected or damaged vacuum lines between the engine and any vacuum operated components
Diagnostic Aids:  Verify the integrity of the PCV system.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST HG .