DTC P0446: EVAP Emission System - Vent Control Circuit: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item		Detecting Condition	Possible cause
Case 1	DTC Strategy	Clogging is monitored	Poor connection Blockage of canister filter Open or short in CCV circuit Defective CCV Defective ECM
	Enable Conditions	Engine speed > 1600 rpm Engine load = 20~85%, CCV "off" Fuel tank pressure sensor voltage = 1.0~3.5V Fuel level < 85% PCSV duty is greater than or equal to 60%
	Threshold value	Fuel tank pressure with CCV opened < -14.71 mmHg (for more 10 sec.)
	Diagnostic Time	Continuous
	MIL on condition	2 driving cycles
Case 2	DTC Strategy	Surge voltage (Vps) is monitored
	Enable Conditions	Battery voltage is greater than or equal to 10V
	Threshold value	Vps < (B+) + 2V
	Diagnostic Time	Continuous
	MIL on condition	2 driving cycles