I have a 2002 Nissan Sentra GXE 1.8 liter engine which failed emissions.
Does anyone know where I can purchase a Purge Volume Control Valve (Code P1444) and a Bank One Oxygen Sensor (Code P0037) on line? Can find the sensor, but it appears, no one carries the Purge Volume Control Valve.
Also, I am having trouble locating the two components on the engine. Heard the Purge Volume Control Valve is under the hood and by the gas tank and the B1 sensor is right below the cylinder head. (Below the cylinder head, there are two sensors right next to each other.) Has anyone used AllDataDIY.com? Heard it will show where all the components are and how to change them. If anyone has heard of a better online manual let me know. Thanks

 

This should be under your warranty that covers all emission related failures. You should have to pay nothing for this repair.
Rob L