Possible Causes
WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
ECM illuminates MIL and sets DTC P1444, when canister purge flow is detected when EVAP-CPVCSV is closed. Possible causes are:
- Defective EVAP Control System Pressure Sensor (EVAP-CSPS).
- Poor, loose, corroded or damaged terminal connections.
- EVAP-CPVCSV stuck open.
- Defective EVAP Canister Vent Control Valve (EVAP-CVCV).
- Defective EVAP canister.
- EVAP system hoses misrouted or plugged.