DTC P04DB-00: Crankcase Ventilation System Disconnected [08/2015 - 09/2018]: Description

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In the PCV system for a turbocharged engine, the blow-by gas is drawn into the intake pipe due to the intake vacuum via the PCV valve in the natural aspiration range, and blow-by gas forcibly flows through the intake pipe via the ejector to recirculate blow-by in all driving ranges in the turbocharged intake range.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P04DB-00	Crankcase Ventilation System Disconnected	PCV system air leakage or suction is detected (2 trip detection logic).	PCV valve and hose PCV hose connections Intake system Engine coolant temperature sensor Mass air flow meter sub-assembly Air fuel ratio sensor Gas leak from exhaust system Wire harness or connector ECM	Comes on	DTC stored	SAE Code: P04DB