P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR

VR38

P0451

Description

The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the ECM increases as pressure increases.

DTC DETECTION LOGIC

If DTC P0451 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to DTC Logic (GT-R certified NISSAN dealer).

DTC No.	Trouble diagnosis name	DTC detecting condition	Possible cause
P0451	EVAP control system pressure sensor performance	ECM detects a sloshing signal from the EVAP control system pressure sensor	Harness or connectors (EVAP control system pressure sensor circuit is shorted.) EVAP control system pressure sensor

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

2.PERFORM DTC CONFIRMATION PROCEDURE

1.CHECK GROUND CONNECTION

2.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER

3.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

4.CHECK INTERMITTENT INCIDENT

1.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

ECM			Condition [Applied vacuum kPa (kg/cm², psi)]	Voltage (V)
Connector	+	–
	Terminal	Terminal
F102	78	75	Not applied	1.8 - 4.8
			-26.7 (-0.272, -3.87)	2.1 to 2.5 lower than above value