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 P1442 when EVAP control system detects a very small leak or does not operate properly. Possible causes are:
- Fuel filler cap remains open or fails to close.
- Incorrect fuel tank vacuum relief valve.
- Poor, loose, corroded or damaged terminal connections.
- Incorrect fuel filler cap.
- Foreign matter in fuel filler cap.
- Leak in hose between intake manifold and EVAP-CPVCSV.
- Foreign matter in EVAP-CVCV.
- Leak in EVAP canister or fuel tank.
- Leak or blockage in EVAP purge line.
- Leak or blockage in hose to EVAP Control System Pressure Sensor (EVAP-CSPS).
- Defective EVAP-CVCV or circuit.
- Defective EVAP-CPVCSV or circuit.
- Defective absolute pressure sensor.
- Defective fuel tank temperature sensor.
- Missing or damaged EVAP-CVCV "O" ring.
- Defective EVAP-CSPS.
- Defective fuel level sensor/pump or circuit.
- EVAP canister saturated with water.
- Defective water separator.
- Defective refueling control valve.
- Leak in On-Board Refueling Vapor Recovery (ORVR) system.