DTC P0451 EVAP. Emission System-Pressure Sensor Range / Performance: DTC Detecting Condition

DTC DETECTING CONDITION AND POSSIBLE CAUSES

Item		Detecting Condition	Possible Cause
DTC Strategy		Rationality check	Poor connection FTPS ECM/PCM
Case 1	Enable Conditions	Idle controller activated
	Threshold Value	Filtered fuel tank pressure > 20.0hPa (41.8 lbf/ft² )
	Diagnostic Time	15 sec
Case 2	Enable Conditions	Time after engine start > 3.0s
	Threshold Value	Filtered fuel tank pressure < -30hPa (-62.7 lbf/ft² )
	Diagnostic Time	15 sec
Case 3	Enable Conditions	Canister purge phase activated Intake manifold press. / amb. press. < 0.62 Ambient pressure > 680hPa (1420.21 lbf/ft² )
	Threshold Value	Counter of [ΔApressure < 0.8hPa(1.67 lbf/ft² ) when the duty cycle of PCSV is increased more than 30% ] ≥ 2 times
	Diagnostic Time	15 sec
MIL ON Condition		2 driving cycle